Showing posts with label Naturalist. Show all posts
Showing posts with label Naturalist. Show all posts

Sunday, February 23, 2014

Just Another Batty Monday

Hey ya'll

Mondays are generally a downer in most people's weekly routine but there are ways of coping with the dreaded Monday Blues. For me, nothing will beats surfing the interwebs and finding a visual goldmine such as this. 
Now this may look like a fairly unassuming hole in the ground, picturesque maybe but hardly anything to shout about... 
Until the photographer zooms in to reveal this...
...and this
...and THIS!!! 
The images above, that seem to be a vision straight out of any naturalist's dreams or chiroptophobe's nightmares is a one of a kind phenomenon that is only observable at the Monfort Bat Sanctuary on Samal Island, Philippines. There are some 5 openings leading to a network of underground caves that are home to an estimate of 1.8 million individuals of Rousette fruit bats (Rousettus amplexicaudatus). Other bat species that may be found in these subterranean networks are the Lesser False Vampire bat (Megaderm spasma) and flying foxes (pteropus sp.) making it the largest colony of its kind in the world since recorded history. Because they live in the tropics and food is abundant all year round the bats are continuously feeding and mating and breeding that overcrowding has begun to pose a serious problem. Using heat thermal cameras researchers have observed bats acting aggressively toward pups and at times, even cannibalizing them as young and adult bats alikejostle about for space in the tightly packed cavern. In an effort to elaviate the probme, management of the Monfort Bat Sanctuary have even proposed the construction of artificial caverns and networks that will enable the bats to roost more comfortably. The caves are maintained and managed by Ms Monfort, a local resident of Samal, who works with bat conservationists to protect the habitat of what is undoubtedly the single most impressive congregation of flying mammals in the world. 

Bats leaving the caves at dusk in search of food
Rare sighting of an albino bat, who is also a mother making a stark contrast among her brown and black peers.
And a closeup of the beautiful mother and her young
Photo credits: Josh Aggars @ Flickr
If you are interested in witnessing this or learning more feel free to contact the Monfort Bat Sanctuary directly at their Facebook Page: Monfort Bat Sanctuary @ Facebook 

Peace Out! :) 

Living the Rainbow: A Selection of Exotic Birds from Around the World pt. 1


Hey ya'll 

I'll be moving back to the Bukit Kinta Rainforest come March 1st 2014 so updates at the blog will foreseeable grow a lot slower. In between now and then, however, I would like to take the opportunity to clear up some of the things I've had stored away for the past few months or so. The following are a list of paintings I did of exotic birds from all over the world. The theme of inspiration for me at that time was the idea of the "Rainbow" and how so many birds seemed to embody it so effortlessly. 

The Scarlet Macaw (ara macao) is a large colorful parrot that is native to South America. They are predominantly red, yellow, and blue in color although certain individuals may ehixibit various patches of green. The range of the scarlet macaw is relatively large but deforestation and capture for the exotic bird trade has made populations of wild birds largely fragmented with small groups existed over large distances in various regions. 

Like many other macaws, they mate for life and nest in the cavities of hollowed trees. Birds are relatively long lived with some individuals recording a whopping 75-80 years of age in captivity. In the wild they may often bee found gathering in large flocks with other macaws and parrots at the banks of rivers partaking in a phenomenon that is known as "clay licking". The reason for this is thought to be because of the macaws largely herbivorous diet that may sometimes include the leaves or flowers of poisonous plants. The clay from the Amazon basin is believed to neutralize many of these toxins and make them safe for the birds to digest. The scarlet macaw is the national bird of Honduras. 


Also a member of the parrot family, the Eastern Rosella (Platycercus eximius) is a small, colorful bird that is native to the Southeastern portion of the Australian continent, and some parts of Tasmania. In recent decades, however, the Eastern Rosella has also become naturalized in many parts of New Zealand, typically North Island and Dunedin. Because of its brilliant coloration, the Eastern Rosella is sometimes kept as a pet bird although, they generally do not socialize as well with their human captors and other birds as other species of parrots. Like most parrots, the nest is made in an abandoned tree hollow and a clutch of five to six eggs may be laid. The yare one of the most colorful of the Australian parrots (barring the Rainbow Lorikeet, which is a fair contender) and may be seen readily in both rural and urban areas. 
This last Living Rainbow is not a parrot at all but a pheasant.  Probably the most underrated of the birds, the males of some pheasant species such as the handsome Golden Pheasant (Chrysolophus pictus) pictured here are some of the most spectacular members of the avian world. The Golden Pheasant is native to the mountainous areas of Western China but because of its popularity as a show bird, it has since established self sustaining feral populations in various parts of the world. The birds are about a meter long, with the tail accounting for most of its length and like many other galliforms, both sexes are highly sexually dimorphic with male birds exhibiting the more beautiful feathers. Golden pheasants are capable of flight but their rounded wings make them rather clumsy in the air. Despite their brilliant coloration, however, the birds are difficult to spot in their natural habitat and consequently, not much is known of the birds' behavior in the wild.  The bird is believed to have inspired early painters and artists with regards to the design of the Chinese Phoenix. 
As always, if you are interested in purchasing any of these images as high quality prints, feel free to browse around the print gallery at my deviantart accounthttp://cyrenization.deviantart.com

Peace Out

Sunday, February 9, 2014

Birdwing Butterflies prints now available on Deviantart!

Hey ya'll

The prints in my birdwing butterfly set have been really popular on deviantart as postcards or prints. Birdwing butterflies are probably one of my all time favorite of butterflies. Not only do their large size make them a breathtaking sight in any setting - both captive and wild - but their iridescent wings and uniqueness to the Southeast Asian region also give them an exotic touch that is quite unique to the species. 

The Southern Tailed Birdwing (Ornithoptera meridionalis) is the smallest of all the birdwing butterflies. Like the Queen Alexandra's birdwing butterfly (which is the largest butterfly in the world) the species was discovered by Walter Rothschild in Milne Bay Province, Papua New Guinea. The species is fairly widespread and may be found in several localities in southeast Papua New Guinea and the southern coast of Irian Jaya. Along with the Paradise birdwing (Ornithoptera paradisea) it is the only butterfly of the birdwing family whose wings are tailed.  Like several other species of birdwing butterflies, it is classified as "endangered" in the IUCN red list due to habitat loss in various parts of Papua new Guinea.  

Conservation initiatives that engage local communities have proven to be fairly successful and there are to date several villages in Papua New Guinea which farm the butterfly for conservation and commercial purposes. The specimens are incredibly valuable and may fetch prices as high as US$1000 per pair. Despite its desirability, collecting of the butterfly has little to negligible effect on its population size provided the original habitats are left undisturbed. The butterflies are remarkable in that they have an extremely small amount of wing area in relative to its large and bulky body. Male butterflies have hind wings that are severely reduced, tapering at the end into a pair of filamentous tails which are easily broken. The males of the species are thus rather clumsy and weak fliers and spend most of their day resting on the canopy layer of primary rainforests. The larva of the butterfly feed on the plants of the genus pararistolochia and incorporate its toxins into its defense system during its development and adult life.  

Ornithoptera priamus, or the common green birdwing, is a very widespread species of birdwing butterfly that is found in New Guinea, Moluccas, the Bismarck Archipelago, the Solomon Islands, and Northeast Australia.  Because of its sizeable range, the butterfly is extremely variable and is believed to have evolved multiple subspecies each exhibiting different markings, patterns, coloration, and forms. According to some experts, there are as many as 99 subspecies of Ornithoptera priamus butterflies although others would contend that some of these subspecies are to be treated as independent species altogether.  Most of the subspecies of Ornithoptera priamus feature brown and cream-patterned females and iridescent green males, although several subspecies such as Ornithoptera priamus urvilleanus, and Ornithoptera priamus miokensis have blue wings. Despite being an overall widespread and established species, some subspecies of the butterfly which are endemic to certain parts of the world are threatened by habitat destruction: primarily the clearing of primary forests (which the butterfly needs for its survival) for the palm oil trade. Many other subspecies, such as Ornithoptera aesacus may be seriously endangered in the wild but otherwise fairly commonly bred in captivity. 

Fun fact: the butterfly is named after Priam, the King of Troy during the Trojan War. 


IF you would like to see similar prints or show your support by purchasing them, do check out my profile on deviantart : http://cyrenization.deviantart.com

Friday, February 7, 2014

Flying Dragon @ Ulu Geroh, Gopeng, Malaysia.

Flying Dragon @ Ulu Geroh, Gopeng, Perak, Malaysia
http://cyrenization.deviantart.com



Several species of "flying dragons" may be observed in the forest around Ulu Geroh but these yellow ones were by far the most common. The "dragons" are part of a diverse group of lizards in the genus Draco that are endemic to Southeast Asia. While they are generally relatively unremarkable in appearance, these reptiles possess a most unique ability to extend folds of skin stretched out between its modified ribs to create a set of wings that enable them to glide from tree to tree. While not exactly capable of sustained flight, some species of "flying dragons" have been observed to be able to obtain lift in the course of their glides and a total gliding distance of up to 60 meters has been recorded, although the average is commonly about 8 meters or so.  Unlike the rest of their bodies - which are commonly drably colored to aid in camouflage - the wings of the dragons are usually brightly colored and patterned. Both male and female dragons also possess a colorful fold of skin under their chins called a dewlap that they can extend at will for display purposes.  Despite their small size, the dragons are highly territorial and males will defend their respective trees from the intrusion of outsiders. In Ulu Geroh, dragons can sometimes be seen dropping from the tops of trees, gliding in a circle, before landing at the base of the tree and slowly making their way back to the top on foot. They are insectivorous and feed on a variety of insects though from my observations it would seem that they are particularly partial to a variety of ants.

Thursday, February 6, 2014

Rajah Brooke Birdwing Plate

Natural History Style plate of a Male Rajah Brooke's Birdwing (Trogonoptera brookiana albescens) an artistic side project and work in progress of the insect life of Ulu Geroh
source: http://cyrenization.deviantart.com

The Ingenuity of Carpenter Bees (excerpts from my Ulu Geroh Field Diary

Day 2
12.1.2014



There were so many things that I wanted to talk to the people about and so many things I wanted to do, but it was hard in the early stages to insert myself into daily situations in such an intrusive manner and so there were some mornings - when families were going about their more intimate of household chores - that I would have literally nothing to do and would thus be relatively free to wander around and entertain my own curiosities. I sat that morning, in the common eating area underneath a beautiful trellis made of very large vines. The vines, which had leaves as big as my upturned palm (some even larger) also sported some very large purple flowers that would attract a large number of animal life. Sunbirds, butterflies and hummingbird moths could usually be found here but today it was the big,  fat carpenter bees. Now, if you've never seen a carpenter bee in your life and saw one buzzing about the flowers as it was doing today you might mistake it for a very large black beetle for that is what it most looks like. You may also notice a distinct buzzing sound like the engine of a very small motorcycle that is made by their wings when they fly. Indeed, this buzzing sound is so loud that carpenter bees are often heard before they are seen. This morning there were two of them flitting about the flowers, and they were doing it with such ferocity that it almost seemed as if they were engaged in a private little race with each other to see which bee could sip from, and pollinate, the most purple flowers on that vine before they ran out. For you see, the bees seemed to possess this remarkable ability - like a special kind of sixth sense - which prevented them from visiting the same flower twice!  A bee would buzz up to a flower, crawl clumsily into its open, upturned "mouth", do it's thing, and then fly noisily off to the next one. Should it happen to hover around the same flower cluster that it had visited before,  it would simply halt its flight, hover a little as if making sure, then move off to a new cluster. This was the same should another bee attempt to feed from an already fed upon flower. In effect, the bees were the epitome of efficiency! No bee visited the same flower twice and the other bees seemed to be able to know which flowers had already been visited as well. In this way the two bees were able to complete their rounds of the vine rather quickly and without any overlapping of flowers between the two of them. I could almost imagine them talking over the buzzing sounds they made a they left.

"Hah! I win today," a triumphant bee one might say.

"Oh we'll see about tomorrow. Just you wait!" says an indignant bee two. 

Xolocopa latipes (tropical carpenter bee) image source: wikimedia.commons

Tuesday, June 4, 2013

Never Forget

Hey ya'll


What's really sad about the state of the world today is that people always complain about how ugly it is, or how corrupted... about how all beauty is lost, when the fact is that that couldn't be any more further than the truth! Beauty still exists. Despite all we've done to the planet, it's still there.  Want to try to find some beauty in your life? Try to be more observant to the things around you. 

Beauty is everywhere. The problem is most people these days don't bother to look. We expect beauty to be presented to us on a silver platter, or a silver screen, the way we are so used to being entertained by our computers, television sets, and smart phones, and so are equally quick to judge the "world" as an ugly place when its beauty is not readily visible to our eyes.

But I challenge you today, to take a walk around your neighborhood. When you've found a comfortable spot, bring yourself down to the level of the Earth. Now, I want you to observe a blade of grass. Pay attention to every detail of it, the way it grows out of its roots, the shade of purple in the smallest petals of the impossibly small flowers, the delicate wisps of fur that sometimes grow from the stalk. For a brief moment try to appreciate the complexity of it. Remind yourself that this is not "just a blade of grass" you are looking at, but a living thing. An organism with a complex system of cells and processes that contributes to the life giving oxygen that we all breathe.  And then try to look even further, observe the many creatures that frequent that blade of grass.

There are always ants of course, but if you look even closer you might see other things. Woodlice, perhaps, that can roll into perfect spheres when they are alarmed. Or maybe even the almost microscopic creatures. So small that they would seem like "insects" to the already diminutive insects!  Sit there for fifteen minutes or half an hour or so and take note of the various activities these animals partake in, so busy in their own tasks, or too small to may anything else any significance. I hope it won't take you too long before you realize that there is an entire world that is centered upon this blade of grass! Now take a step back and look all around you.  Take in every single blade of grass in the area, each containing its own secret little society. Take a step back further and think about this on the scale of the entire neighborhood. There are multiple "worlds" within our world, so close to us and yet so invisible from our own. Each blade of grass is its own community, each garden, a world, each patch of green, a universe! 


My friends, there is beauty everywhere (especially where there is a little Green!). One only need take the effort to look. 

Life History of the Monarch Butterfly (Danaus plexippus).
photo source: http://cyrenization.deviantart.com


Tuesday, April 23, 2013

Top 5 Insect Super Powers

Hey ya'll

In the first part of "Super Powered Insects", I talked about comic books characters that were inspired by the wonders of the entomological world! In the real world, however, many insects are similarly known to possess unique and amazing super-power like abilities! The following are a list of the top 5 insect super powers that I could come up with. 

1. Super Strength! 

A staple in any superhero comic universe: what would DC comics be without Superman, Marvel without The Incredible Hulk, and the natural world without... the industrious ant? Ants are one of the strongest creatures in the animal kingdom, capable of lifting several times their own body weight!!! The actual degree of super-strength varies between ant species, but on average an individual ant can lift anywhere between 10 - 50 times its total body weight. They can even do this upside down, while clinging on seemingly smooth glass-like surfaces! That's pretty amazing. Now it may seem surprising that such a small animal is capable of such feats of strength but the reason behind it all boils down to good old fashion physics and the concept of scaling. Because of their relatively small sizes, ants do not have much body mass. In comparison with this body mass, however, a large proportion of the ant's body is made up of small insect-muscles. Proportionately speaking this gives them the ability to lift and manipulate objects that are much larger and many times heavier than their own body weight. And its not just ants, but insects in general! Honey bees, for instance, have been observed to be able to lift up to 80 percent of their body weight in FLIGHT! More, when they're on the ground. It is not an absolute rule but a general one that the bigger the animals get (and the larger their body mass is) their ability to lift objects of equal to, or heavier than their own weight greatly decreases. Take elephants for example. Elephants can lift up to many tons but did you know they are quite incapable of lifting their own body weight? I guess this is one of those instances where small size, works to their advantage. 

2. Flight

Another fairly common staple power in comic books, flight is an ability most adult insects possess. These guys were virtually the first living things in the world to evolve the ability and subsequently, may be said to be one of the most accomplished as well. Of all the fliers of the insect world, however, it is arguable that none are perhaps as accomplished as the dragonfly! Dragonflies have been around for millions of years, and aside from a drastic decrease in size, have not seemed to have changed very much from their prehistoric ancestors. Consequently, they've also had ample time to perfect their flying skills making them quite literally, the masters of the air. Most dragonflies flap their wings at only 30 beats per second (this is very slow, in comparison to most insects like bees who flap their wings at about 300 times a second) but are still able to complete aerial feats of stunning magnitude! They are accomplished fliers, reaching speeds of up to 58 kilometers per hour (that's about 36 miles) and are more than capable of making sharp turns, sudden dives, and even flying backwards! The reason dragonflies can do this is because of their unique anatomy that enable them to use all four of their wings independently. When used in conjunction with their excellent vision, the dragonfly's mastery of flight makes it an excellent and accurate predator, capable of snatching insects up in mid-flight. 

3. Webbing

Bound 
Okay, so this is not exactly your typical super power! But what would this post be without a reference to spider man! Spider silk is one of the strongest organic substances known to man! The drag like silk of many spider webs (designed to stop flying insects in mid-flight) has often been equated to having the tensile strength of a high grade allow steel filament of the same diameter (purportedly a proportionately spun silken web would even have the strength to arrest a commercial airplane in mid-flight). And while spiders are arachnids and so, not insects (no need to get into a twist, I did not forget that fact!) they are not the only animals capable of producing webbing! The larvae of many insects, perhaps most notably those of butterflies and moths, are quite capable of excreting a similarly fibrous substance that is also known as silk. The silk produced by silkworms (bombyx mori) for instance are one of the strongest natural fibers known to man! In fact, silk garments dating back to 1782 was discovered in relatively durable condition in a wreck expedition in 1840! Silk. is also naturally resistant to most mineral acids. 

4. Radioresistance

Man destroys man. Insects inherit the earth.
I am sure that most of us are no stranger to the urban legend that cockroaches are the only animals capable of surviving a nuclear blast. Now, while it might more accurately be said that cockroaches are capable of surviving the aftermath of the blast (the actual blast would probably kill any roach caught in its vicinity by sheer explosive force a lone), I've got even better news for you: same goes to all insects! Now, I am no expert on radiation, but from what I have read up on the subject, this has something to do with the differing nature of vertebrate and invertebrate cells. Radiation is DEADLY to vertebrate animals and this is because our cells are constantly multiplying. Old cells die every second and are replaced by new cells through the process of mitosis (or something). Radiation affects these growing cells by causing them to act and multiply in ways that are different to their original function which would then eventually lead to mutation (the kind that gives people cancer. Not superpowers). Invertebrate cells, however, only multiply rapidly at specific times of the year. Typically, when they are about to undergo the process of molting. This means that of all the insects who survive the initial nuclear blast, those that are not close to the process of molting would be able to withstand the effects of radiation. In fact, some of these insects may be exposed so long, that their bodies begin to adapt to be genetically radioresistant. This positive trait is then passed on to future generations of insects born in the environment creating a strain of radioresistant insects! And this is no longer the stuff of science fiction or urban legend! Naturally radioresistan insects, worms, and plants have already been discovered in places like Minas Gerais, Brazil, that possess naturally high levels of radiation. 

5. Mind Control 

Take me to your leader! 
I saved the best for last. Mind control is often associated with super villains in the comic book genre. Even when heroes actually possess the capacity for it, they use it only sparingly. There is something entirely sinister about invading the thought processes of another creature and bending it against its will. It is therefore with no surprise that this category goes to the super villains of the insect world: the parasitic wasps. Parasitic wasps are quite literally the nightmares of the insect world. Imagine the worst fear you've ever experienced in your life and now multiple it by a hundred. If insects were capable of complex emotional thought, that would be the kind of year you would feel if you were a helpless larvae facing down the nightmarish gaze of a parasitic wasp. Like elegant but deadly assassins, the wasps employ a wide range of methods to subdue, and coerce their prey. The female of the jewel wasp (Ampulex compressa) for instance, preys on the common cockroach. She delivers two stings, both targeted at the roach's ganglion (that's the insect equivalent of a central nervous system). First, she does this to paralyze the front legs of her prey thus reducing mobility and inhibiting resistance. Next, she delivers a second sting at the direct spot of the roach's brain. This causes an immediate behavioral change in the roach. It becomes docile, it becomes compliant, and it will now follow the wasp willingly (as if being led on a leash) to her nest ,where she will proceed to deposit a single egg upon the roach's abdomen. When the egg hatches the larvae will feed on it, eventually living inside of it as an endoparasite. The larvae feeds only on the non-essential organs of the roach thus keeping the host alive until it is matured and ready to emerge as a fully grown wasp. Throughout the entire process, the roach is motionless. It is alive, but does not attempt to escape, seemingly content to rest in the burrow allowing the larvae to eat it alive. For all intents and purposes, the wasp's sting has turned it into a zombie. In another species of wasp, the larvae becomes a parasite of large spiders and upon maturity, will alter the spider's behavior to use its dying strength to spin a silken cocoon to protect the larva during its final stage of development. Talk about creepy. 

So that's it for my list of the top 5 insect super powers! Know any others I might have missed out, or wish to request something be added to the list? Send me a shout on any of my social networking pages (twitter, facebook, email) or leave a note in the comments below! 

Cheers,
Cyren. 

Sunday, April 14, 2013

Memoirs of a Light-Trapper: expeditions and experiments in light-trapping pt. 1


Hey ya'll

Chasing after butterflies and other flying insects with a net can be great fun during the day, but catching nocturnal insects is a totally different ball game altogether. It is, after all, not very practical for one to go traipsing about in the forests in pitch darkness while waving a net blindly around in hopes of accidentally catching something that flies by! As such many entomologists and lepidopterists have developed, over the years, a variety of techniques and methods that are quite reliable at attracting insects for the purposes of study or collection. The most efficient of all these, is probably light trapping. Light trapping is basically a method of attracting insects that involves the use of a light source (usually a mercury vapor bulb, or some other source that emits UV light). The light is often dispersed through the use of a white cloth (that can greatly increase the light's surface area) and functions as a veritable beacon that attracts moths, beetles, and any large number of flying insects to its surface. Think of a bug zapper, but on a larger scale. And minus the deadly electricity. Insects attached to the white cloth may then be studied in closer detail, photographed, or collected depending on its purpose.


Recently, I've had the opportunity of conducting one such expedition which took place in the form of a mini experiment. Two light traps were set with different bulbs, one emitting a specturm of UVA (orange/warm light), the other of UVB (white light). Through the course of the night we discovered that different insects were attracted to different spectrum of light. While the UVA bulb seemed to attract more insects on the initial stage, many of them eventually shifted their focus over to the UVB bulb where they proceeded to swarm and seethe in a writhing mass of antennae, legs, and wings. The diversity of insects which arrived was also, to say the least, quite astounding and we had (in addition to moths of just about every shape, size, and color) some very attractive looking beetles and cicadas. Below are some of the amazing insects that were attracted to our light traps that night.

These are some of the moths that were attracted to our light traps. Among all the insects that eventually came to the traps and stayed, I'd have to say that the moths were the most numerous. Most of them were small and brilliantly patterned, although we would eventually come across several sphingiids and saturniids as well. Geometriids were the most common and most of these came in various shades of yellow or green, many similarly patterned with geometrical map-like markings on both wings. 



We eventually nicknamed this moth "Hellboy" until a more concise definition
can be offered.




Aside from moths, the traps also attracted more than their fair share of cicadas! The large insects are clumsy fliers and, after slamming unceremoniously into the light bulbs and walls repeatedly, they would often crash onto the ground where they remained, seemingly in a state of stupor. They were so stunned by this I could even pick them up and place them side by side on my outstretched palm with little or no effect. 


Cicadas came in all shapes and sizes that night! We counted no less than 6 different species that were attracted to the traps. 


There were also an astounding diversity of beetles at our traps. Of all the insects, these were perhaps the worst! Beetles are clumsy fliers at best and when in a state of fright, have sharp claws that they can use to devastating effect. I had many bad experiences with beetles that fell down my color and proceeded to dig their claws into any portion of my skin they happened to come into contact with that the time! I shall take note to wear tighter fitting clothes when I try this again in the future! Most of the beetles weren't particularly remarkable, but we did find several of the long horn (Cerambycidae) and rhinoceros (Dynastidae) variety. Some of these, I ended up keeping, for virtue of their unique appearances! Second note to self: long horn beetles have fearsome jaws and can deliver quite a bite!!! 

The largest cerambycidae that was attracted to our traps that night. It measured several inches from head to tip of abdomen and eventually managed to bite hard enough to crack the flimsy plastic lid of the container.
Of all the other insects that were attracted, most were aletes, the winged generation of various ants and termite species whose identification simply goes beyond my capabilities. There was also a stick insect that somehow found its way there, and a rather opportunistic praying mantis. There really are a lot more pictures to go through, and I will upload them in the second part of this blog post when our photographer, Miss Joanne Tong, has sorted them out from her camera. Until then, Happy Monday.





Cheers, 

Cyren.

Tuesday, April 9, 2013

Keep Calm, they're only 17 year Cicadas!


Hey ya'll!!! 

I woke up this morning with the following item on my news feed "Largest Brood of 17 Year Cicadas to be expected in Spring!" it was shared by a friend and I instantly thought to myself WOW! What a magnificent sight they must be to behold! Evidently, though, the same opinion was not shared by said Facebook friend who included (along with her post) a status update lamenting that "it must be the end of the world!!!" My response to her was typically the same one I came across on this amazing website cicadamania.com :




Cicada nymph! Aren't they cute???
The 17 year cicada is not a locust (as they are sometimes confused for) but an insect belonging to the order of hemiptera, or "true bugs". They are of the genus "magicicada" which was named not because the insects are necessarily "magical" in any way, but because they seemed to miraculously appear out of thin air "just like magic" only once every 13- 17 years. In reality though, the sudden "disappearance" of cicadas for such a long period of time after the 4-6 weeks they are active may be attributed to the insect's prolonged developmental phase. Cicada nymphs (which essentially look like smaller versions of adult cicadas but without wings) live their entire lives under ground where they feed on the sap generated by the roots of large trees. 



transformation of the cicada
from mature nymph to
adult.
The nymphs must go through a process of incomplete metamorphosis whereby they undergo 5 molts (or instars) before they graduate as adult cicadas and the process can take anywhere between 13-17 years which accounts for the "sudden" disappearance of the insects for such a long period of time.  When they do emerge, however, they often do so simultaneously and in very large numbers! This is thought of to be some form of survival strategy known as predator satiation. Cicadas emerge in the thousands, sometimes even in the millions, which makes it impossible for any predator to completely kill them off! This means that there will be plenty of cicadas leftover to mate and lay eggs, thus ensuring the survival of the species. This phenomenon is unlike that of the locust swarm because while the locust swarm is literally a band of insects that move, breed, and feed as a large group, the cicada swarm is really just  a means to an end: ensuring enough adults survive long enough to pass on their genes to the next batch of insects. Indeed, such is the life cycle of most cicada species though the 17 year cicada is the only one to do so in such record numbers.

Other interesting facts about the 17 year cicada 
  • The 17 year Cicada is also known as the periodical cicada. This is because of their survival strategy of emerging in large swarms over the span of a certain period, as opposed to every year. 
  • There are a grand total of 7 species that make up the genus magicicada and 4 of these emerge on a 13 year basis. 
  • The 17 year cicada is perhaps most known for its ability to generate a loud, sometimes deafening sound (as is the case with all cicadas). Male cicadas do this to attract mates and do so by popping a set of muscles on their abdomen known as "tymbals", in and out rapidly.
  • Unlike locusts, cicadas do not defoliate entire plants. Adult cicadas possess piercing mouth parts that they use to suck the sweet sap from trees. Slender trees may be damaged by this process, but large stronger trees do fine. 
  • Last, but not least (this one is my favorite!) 17 year cicadas are affected by the massosporan fungus. An infection that is the equivalent of Cicada STD as it is spread through mating and causes the abdomen of adult cicadas to fall off! (Yikes!!!!)
You can read of such facts, and more at www.cicadamania.com

In conclusion, though the sights and sounds of an insect swarm of such gargantuan proportions can seem like a daunting, even intimidating prospect, when all is said and done... they only come once every 13-17 years! And aside from the loud sounds and the occasional clumsy cicada smack to the face: these insects are really quite harmless which totally begs the question: why can't we all just get along? 

Cheers,
Cyren

Wednesday, April 3, 2013

Artist, Lepidopterist, Woman: Celebrating the Life and Work Maria Sibylla Merian

Hey ya'll

When celebrating the contributions of some of the great women in history, it is often easy to overlook (among all the humanitarians among great women) the women who were involved in the documentation of natural history such as Maria Sibylla Merian. Maria, a naturalist and scientific illustrator, was not only one of the first woman to be actively involved in the field of natural history (then considered a primarily/if not exclusively male domain) but also the first to carefully observe and document the life cycle of insects thus making her one of the most significant contributors to the field of entomology. It is therefore of much appreciation that Google chose to feature, and celebrate her life yesterday by changing their header in commemoration of her 366th birthday. 

Early Life

Maria Sibylla Merian circa 1700
For much of her early life, Maria Sibylla Merian exhibited a fascination for insects! Having been encouraged to take up drawing and painting by her stepfather, Merian eventually began to utilize her talent to document and illustrate the various creepy crawlies that she encountered. Of particular interest to her, not surprisingly, was the metamorphosis of caterpillars into butterflies and moths. 

I spent my time investigating insects. At the beginning, I started with silk worms in my home town of Frankfurt. I realized that other caterpillars produced beautiful butterflies or moths, and that silkworms did the same. This led me to collect all the caterpillars I could find in order to see how they changed. 

In Holland, with much astonishment what beautiful animals came from the East and West Indies. I was blessed with having been able to look at both the expensive collection of Doctor Nicolaas Witsen, mayor of Amsterdam and director of the East Indies Society, and that of Mr. Jonas Witsen, secretary of Amsterdam. Moreover I also saw the collections of Mr Fredericus Ruysch, doctor of medicine and professor of anatomy and botany, Mr. Livinnus Vincent, and many other people. In these collections I had found innumerable other insects, but finally if here their origin and reproduction is unknown, it begs the question as to how they transform, starting from caterpillars and chrysalises and so on. 

(Foreword from Metamorphosis insectorum Surinamensium)

Contributions to Science 

a plate from Metamorphosis insectorum
Surinamensium
As evinced from her foreword, it would therefore seem that though an interest and study in natural history was quite dispersed at the time, not many people displayed an explicit interest in the origin and life cycles of many of their insect specimens. This in turn might be retrospectively attributed to the common belief in those times that insects were "Beasts of the Devil" and thus, spontaneously generated from the ground. As an amateur lepidopterist, Merian's work with butterflies and moths, and a grand total of 186 insect species might therefore be said to be pioneering in that it was one of, if not THE first work to document insect lifestyle and evolution with such attention to detail.


Plate from Metamorphosis Insectorum
Surinamensium
Conversely though it can be argued that there were some local scholars of the time who had already been aware of the life cycles of butterflies or moths, it could also similarly be opined that not many of them truly understood this process. It was Merian's work, for example, that first illustrated the fact that caterpillars were often dependent on specific host plants and that eggs were often laid close to, or on these plants for ease of the developing larvae.  In addition to her work with insects, Merian successfully discovered and described a whole range of animals and plants in the interior of Surinam. Her classification for butterflies and moths and her use of Native American names to refer to the various species of plants she encountered is still relevant in the field of science today. In fact, the infamous "bird eating" spiders of South American probably owe their reputation and name to a drawing made by Merian depicting such a spider devouring a small bird.

A Curious Woman in a Man's World
a plate taken from Metamorphosis insectorum
Surinamensium

Although much of Merian's work, such as Metamorphosis insectorum Surinamensium, and The Caterpillar's Marvelous Transformation and Strange Floral Food were very popular in high society as a result of its publication in the vernacular, much of Merian's work was continuously largely ignored by many within the scientific community at a time when the official language of science was considered to be latin. Similarly, many male scientists, who had never set foot in Suriname themselves, claimed her to be a fraud. Naturalists like the Reverand Lansdown Guilding dismissed her description of army ants and bird eating spiders stating that "Madame Merian has told a willfull falsehood." Such criticisms and accusations would eventually take a toll on her reputation as a careful observer of nature.

Furthermore, while scientific surveys of natural wildlife were not exactly uncommon at the time, they were usually carried out by men who were already being sent to colonies to live, or work, there. Consequently, Merian's decision to self fund her own expedition in pursuit of her interest raised many eyebrows especially over the fact that she was a woman. Despite the doubt of others, Merian's perseverence and tenacity paid off and in 1699, the city of Amsterdam sponsored her petition to travel to Suriname in South America. During stay, Merian traveled between the various colonies, documenting any plant or insect life she came upon there. "In the era of investigation dominate by the collection and classification of organisms, Merian's organic apporach to the study of natural history was unusual and was not always understood by her fellow scholars," (Etheridge, 2010: 19). Incidentally, her observations on the metamorphosis of frogs was the first to ever be recorded with such accuracy. She also took note of the natives and black slaves that were then employed by Dutch planters and is often quoted to be quite critical of the treatment of the Dutch masters over these people.

Late Life

Plate from Metamorphosis Insectorum
Surinamensium
Barely 2 years into her expedition, however, Maria contracted a case of malaria and was forced to return prematurely to the Netherlands. There she spent her life selling the specimens she had collected and publishing engravings of the plant and animal life she had encountered in Surinam. In 1705, she published the world famous Metamorphosis Insectorum Surninamensium. In 1715 at age 67, Merian suffered from a stroke which greatly affected her ability to work. Not much is known about her later life from this point on except that she is listed in a registry as being a pauper. Merian died, two years later in Amsterdam. Her work was only rediscovered, recognized and reprinted in the last quarter of the 20th century. 


Merian and her work is continued to be recognized in this day and age, and her likeness has graced both the likes of stamps and currency but it is arguable that not many people have actually come to recognize and appreciate her contributions to the field of science with specificity to the field of entomology. As a feminist, and an amateur lepidopterist myself, I suppose you could say that I have come to deeply admire Merian and have a strong sense of appreciation for her work (I even have a few of her prints that I intend to frame and display alongside my butterfly and moth collection someday). Perhaps, when I begin conducting my own field studies in the Northern part of Malaysia, I can undertake a similar personal project of my own! It is therefore with much praise and approval that I publish this post in conjunction with Google's tribute and celebration of her Meria Sibylla Merian's: artist, amateur lepidopterist, woman.