This is the world’s newest tarantula species!
She was found in the forests of Malaysia. (Birupes simoroxigorum)New species are so amazing. To think that they may have been here all this time and we’ve only just found them? Even though my sister is cringing about a spider post, (she has one of those vacuum devices to safely remove them from her house) I had to investigate.
And I love the color blue!
Tarantulas with blue coloring are more common than you’d expect. This is interesting because tarantulas don’t rely on their vision as much as other spiders.
Many spiders do rely more on their eyes. Top left, the huntsman spider, seen with prey. Top right the wolf spider pictured with spiderlings, Bottom left, the jumping spider, which sees in 3D. Bottom right, the gladiator spider which hunts with a net.
Animals evolve their colors in different ways. Sometimes color is produced by absorption of certain wavelengths of light by biological pigments. (biochromes) Animal pigments can give color to skin, eyes, feathers, fur, and hair. This isn’t just for looks. Pigments have a function.
Melanin is a yellow to black pigment in our skin that helps to protect it from sun damage
Hemoglobin enables blood cells to carry oxygen to our tissues.
Plants have pigments, too. Chlorophyll, for example, serves a very important function for photosynthesis.
Or coloration can occur because of light scattering from tiny photo nanostructures. Nanostructures produce color through various physical mechanisms including diffraction, coherent scattering, and interference. This type of color (a few examples below) is called structural or bioluminescence.
The reason behind theses types of coloration changes can include camouflage, predation, to signal communication, or to attract a mate.
But tarantulas are largely nocturnal, ambush predators. Plus, they live in burrows. It’s dark at night (and underground) so you normally wouldn’t be able to see these colors. They don’t want to be spotted by their prey. And tarantulas have many enemies to worry about, too.
Their beautiful coloration is also an enigma because of their poor vision. Although tarantulas have eight eyes like all spiders, they only have a single type of photopigment which means low visual acuity.
Socotra Island Blue Baboon of Yemen (Monocentropus balfouri)
Then why do tarantulas need such bright blue, iridescent coloring?
There is no real consensus on this. One theory is that most of the tarantula’s enemies are evolved to see green, so blue acts as camouflage. But this backfires when it comes to most humans, who, like me, are attracted to beauty.
In fact, illegal tarantula collecting is a growing problem worldwide. The illegal tarantula trade is a little known corner of the black market in wildlife.
Don’t misunderstand….legal pets are great!
This is our bearded dragon, Ozzie. He is not blue, but he loves blueberries.
Yet, illegal smuggling harms animal populations around the globe. Elephants and rhinos have been among the hardest hit, but smaller, more obscure animals are sought after too. Sometimes as pets, but also for use in traditional medicine, or to create jewelry and the like. Tarantulas are considered a delicacy in certain parts of the world.
Endangered Peacock Tarantula of India (Poecilotheria metallica)
People may not care about tarantulas as much as elephants. Tarantulas have a bad rap. They don’t have the benefit of catching their dinner in a sticky web. They ‘sit and wait’ for prey to come to them, and when within sensory range, pounce. They move quickly, which can be off-putting. (Film and television have capitalized on their bursts of speed, and often cast them as the villain) Most tarantulas are shy, so they’d rather hide or even play dead than engage.
They are surprisingly delicate. A fall from even a few feet can kill them.
Most New World (Western Hemisphere) tarantulas have urticating hairs to protect them from small predators. Generally, those tarantulas are fairly docile by nature.
Old World (or Eastern Hemisphere) tarantulas do not have urticating hairs. They are more defensive, and may bite if provoked. If they do feel threatened enough to defend themselves, their venom is often less potent than a bee’s.
Costa Rican Zebra Tarantula (Aphonopelma seemanni) above
The Martinique Pinktoe (Caribena versicolor) of the Caribbean Islands, pictured to the left is very calm and mild-mannered.
There are good reasons to care about them. Scientists studying venom have learned more about pain and diseases like epilepsy. Tarantula’s don’t spin webs but they do produce silk, for their burrows and to protect their eggs. Other species use the tarantula’s excess silk for nests. Tarantulas help control agricultural pests such as crickets and beetles, because they eat them. Currently, scientists are investigating silk for robotic muscle. Tarantulas deserve a place on our planet.
Powder Blue PinkToe (Blue Avicularia) and Greenbottle Blue (Chromatopelma cyaneopubescens)
And Charlotte’s Web is one of my all time favorite books!
Birupes simoroxigorum photo courtesy Chien Lee http://www.chienclee.com
Monocentropus balfouri photo from Pete Kirk of the British Tarantula Society
Aphonopelma seemanni , Caribena versicolor, Aphonopelma seemanni and Chromatopelma cyaneopubescens photos courtesy Vanessa Sarges
Poecilotheria metallica photo courtesy of Rick C. West birdspiders.com
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