Velvet Revolver

I have been somewhat disappointed with the limited ability for back-and-forth communication on Blogger, so, at the suggestion of some of my colleagues at the Writing Center¹, I’ve started a forum on another site, which can be found here. Please visit it, and let’s start some fun discussions. This month’s EUT comes once again from ARKive, though I’m sure I had seen it in the past, and skipped over it due to lack of information. I think I’ve got enough to talk about this time around, so here is the Pink Velvet Worm

Image from ARKive

At a little more than an inch long, the Pink Velvet Worm (Opisthopatus roseus) looks something like a squishy centipede. However, it belongs to the phylum Onychophora, though most of the members look quite similar to the human eye. Velvet worms, as they are commonly called, are quite closely related to the Arthropods, though they lack the jointed legs that give the latter group its name. Instead, they have dumpy-looking caterpillar-esque legs with a pair of claws on the bottom of each.

All velvet worms are carnivorous, feeding on any invertebrate smaller than them. Much smaller prey are simply hunted down and eaten, but for larger prey, they have the coolest prey capture method: twin projectile glue guns concealed in their face, which they can fire up to ten times their body length. This glue is also useful for deterring predators, because no one wants that in their eyes.

Back to the Pink Velvet Worm itself. It has been found in a single forest in South Africa, and this forest has been logged heavily since the 1900s, both for the wood, as well as for plantations of non-native vegetation. These three factors—the small range, the logging, and the invasive species—have conspired to place the Pink Velvet Worm on the Critically Endangered list.

Conservation efforts are still in the works, of which listing is just one. They are putting together education efforts, which have worked in the past for other animals. Also, there are five Pink Velvet Worms in captivity, and hopefully we can learn more about what they do from these squishy little ambassadors to our race.

¹Yeah, I’ve been working at a Writing Center for about a year now. It’s made me a heck of a lot more confident with my writing. There’s no better way to learn something than by teaching someone else.

Velvety Underground

I’m sorry I missed February, but I started the in-depth work on my thesis, which makes it difficult to get into the blogging mindset. However, I have found another parasite that has managed to get listed¹. They live on the bodily fluids of a single species, rarely even seeing the light of day. After that description, I want you to imagine an orchid.
Now, look at this picture.

Image from ARKive

This is the Underground Orchid (Rhizanthella gardneri). While many orchids are parasitic—living as the botanical equivalent of a louse—they produce pretty flowers, so no one thinks twice about trying to save them. The Underground Orchid’s lifestyle is not much different, except for the fact that it looks like a root with a tumor. It lives in the root system of the Broom Honey Myrtle, a pine-like tree from Australia. This orchid produces no chlorophyll, because that would be pointless if the flower might break the surface. Instead, it gets its energy and nutrients from the Myrtle, but it’s not as simple as that. It never is.

I had originally thought that parasitic plants work by putting its roots into the roots of the host and effectively sucking the tree’s blood. Some do. The Underground Orchid, however, is myco-heterotrophic. This means that there is a fungus living in the Myrtle’s roots, sucking out its juices. The orchid then subsists on the juices of the fungus, making this some sort of strange nesting-doll version of parasitism². The end result is still the orchid parasitizing the tree, but with some (unwilling) help from a root fungus.

The Underground Orchid relies on the existence of the Broom Honey Myrtle, and tracts of these trees are being cleared to make way for agriculture. People are also attributing a decrease in health of the myrtle to a decrease in the numbers of the orchid. Preservation sites are being set up throughout the Underground Orchids’ range to help save them. Also, botanists are also working on finding a way to breed these root-flowers in captivity.

¹Just so you know, the Pygmy Hog-Sucking Louse managed to get a mention on QI.
²I’m sure there is some Australian burrowing insect that would suck the juices out of the orchid, making this even more recursive.

Come Sail Away

I'll be the first to admit that this month's EUT isn't all that ugly, but they can't all be eldritch abominations from the dawn of time. It does, however, look very dragon-like, though the color makes it look like it's straight out of a cartoon.

Image from SailfinDragon.com

This is the Philippine Sailfin Lizard (Hydrosaurus pustulatus). It lives up to its name well, with a tail that would not look out of place on a Dimetrodon¹. As one can guess from the scientific name, the Sailfin is not out of place in the water, using the sail to power its swimming through the rivers of the Philippine Islands. In this case, swimming is mostly a defense mechanism to avoid terrestrial predators, though they have been known to eat crustaceans. This supplements their mostly herbivorous diet of fruits and leaves.

The fact that the males have a larger tail fin, along with their crayon-blue color, suggests another reason for the fin; the same reason Blue Iguanas are blue--it looks sexy. If a male has enough energy to produce a fin that large, and can still escape predators despite being the color of an interstate sign, that means he's got some good genes to pass down to the kids.

The Sailfin Lizard is no longer listed as Vulnerable on the IUCN list. This is not necessarily a good thing. It has been moved to Data Deficient, which means we don't really know how bad it is. Life on a tropical island means habitat loss is almost a given threat, but overshadowing that is the pet trade.

Ah, the pet trade, such a mixed curse. It destroys the wild population, without killing that many of them. If they can be bred in captivity, it means they might be able to be bred to be released. It also means that there can be a higher demand for them, leading to more being taken from the wild. It about killed the Red-Kneed Tarantula and Macaws², but it might save the Axolotl. It looks like it could go either way for the Sailfin Lizard. This guy (where I got the picture) is selling captive-bred Sailfins as pets, and these guys are breeding them the same way to be released into the wild.

¹Dimetrodon are actually more closely related to us than they are to this lizard.
²You do not want a Macaw as a pet. They might be pretty, but imagine having a five-year old child for seventy years. Whose screams can be easily heard for miles. Who can bite through an eighth of an inch of steel.

I'm Not Dead

Last month, Phantom Midge made a wonderful suggestion for an EUT that I hadn’t thought about. I had known about it for ages, and, like her, had been pronouncing it wrong for years¹. Somehow, without any foreknowledge, I’m managing to post this on an exceedingly appropriate day, as today is the 70th anniversary of its discovery as a living animal.

^{Image from Dinofish}

Order Coelacanth (pronounced See-la-canth) had been well documented since 1836, and fossils show that it lived for 345 million years between the Devonian period and the end of the Cretaceous period, when the dinosaurs died out. This must have come as a big surprise for the West Indian Ocean Coelacanth (Latimeria chalumnae) caught by fishermen off the coast of South Africa in 1938. These fishermen were friends with the curator of a small, local museum, and she would frequently check through their catch for anything interesting. Needless to say, something interesting was, in fact, found. Dinofish, who seem to be experts on this matter, have the whole long story on their site in far more detail than I can manage.

Coelacanths spend most of their time in deep (90-200m) caves, where they suction feed on any fish smaller than their head. Exceedingly sensitive eyes, along with an electro-sensory organ help them hunt. These are not small fish, getting up to about 6 feet in length and weighing about 175 pounds, thus surpassing the other “Living Fossil” fish I wrote about². Coelacanth tail fins are split into three fleshy sections, and all eight of their fins move in a mesmerizing, visualized wonderfully—as always—in an ARKive video.

I was surprised the Coelacanth is listed at all, much less as Critically Endangered. I thought there would be far too little information on its numbers and habits to be called anything other than Data Deficient. Analyses of populations in 1989 suggested that there might only be 500 individuals left. The low population, ironically enough, might be attributed to by-catch. This could explain why all the natives were so perplexed when the Europeans got excited by the catch of a fish they knew to be inedible³. Since then, conservation and outreach programs have given fishermen the tools to release the fish directly back to the murky depths from which they came.


¹In Freshman Zoology, I made a list of letter combinations that made an “s” sound. “Coe” always annoyed me, because I’ve never seen it outside of biology.
²Wikipedia has some nice articles about the term “Living Fossil.” Coelacanths are a “Lazarus taxon,” while the Australian Lungfish falls into the wider “Living Fossil” expression. I don’t think I’ll ever get a chance to write about an “Elvis taxon.”
³Never underestimate the local population when it comes to ecology.

Put the Lime in the Coconut

Oversized arthropods will always be welcome on this blog. Alright, most arthropods are condidered icky enough, but there is a special type of revulsion saved for really big creepy-crawlies. Well, I've already written about the largest freshwater invertebrate, so the largest terrestrial invertebrate can't be far behind¹. Also hailing from order Decapoda, this is the Coconut Crab (Birgus latro).

Image from Cook Islands Natural Heritage Trust³

When I say "big," I'm sure that you're looking for some measurements to back that up. The Coconut Crab, also known as the Robber Crab or Palm Thief, has a body length of 1½ feet, with a legspan of 3 feet. It weighs up to 9 pounds but its strong claws can apparently lift up to about 60 pounds. Yes, this crab can lift a medium-sized dog.

Why is it so beefy? Well, anyone who has tried to open a coconut with simple tools can answer that. This is not an easy fruit to get into. The Crab will strip the outer husk near the germination pores (those things that make a coconut look like a bowling ball). It will then use one of its legs to punch a hole through the inner husk, and break the coconut apart. Once again, ARKive provides us with wonderful footage of this in action.

Mating occurs quickly and on land, and the female carries the eggs under her abdomen. She then drops those into the ocean, where they hatch into marine larvae that look something like shrimp. Coconut Crabs are closely related to the Terrestrial Hermit Crabs you'd see in pet stores, and the young will find snail shells to protect their soft rear-end. As they grow larger, their abdomen grows a thick carapace, so they lose the need to find snails. Good thing, too, considering their size. They also become fully terrestrial, though they can still drink seawater.

Coconut Crabs are found dispersed throughout islands in the South Pacific. Being a huge crab, no one would be surprised that they're hunted for food. Being an island species also means invasive species like rats, pigs, and ants are a problem for the juveniles. As the islands get more populated, habitat destruction is a problem as people encroach on the beaches. As population estimates vary from island to island depending on the number of people there, the IUCN lists the Coconut Crab as Data Deficient.

Conservation varies from island to island as well. Some places set hunting limits, while others have set up breeding programs. More research needs to be done to really find out how to help these huge creepy-crawlies out.


¹The fact that weight is pretty much meaningless in the ocean leads to some pretty big invertebrates down there. The Japanese Spider Crab²(Macrocheira kaempferi) with a 13 foot legspan wins as the largest arthropod, while the Colossal Squid (Mesonychoteuthis hamiltoni) puts all other invertebrates to shame with a body length of 33 feet.
²You can't tell me that picture doesn't look like a video game boss.
³The image that many of you were expecting to see was probably this one, which I would have used if I could have found an original source.

Be Prepared

Many of my readers may know that the Spotted (or Laughing) Hyenas’ (Crocuta crocuta) reputation for being scavengers is undeserved; they hunt at least as frequently as Lions. A smaller subset probably knows about the… um… interesting morphology found in female Spotted Hyenas. I hate to disappoint, but the Hyena I’m writing about today has neither of those characteristics. Meet the Brown Hyena (Hyaena brunnea).

Image from Lioncrusher's Domain

It is much scragglier than its spotted relative, as well as being smaller. Their main food source is dead things, which they find using their acute sense of smell. While most of their diet is made up of carrion, this doesn’t mean they don’t hunt. Do you want to see a moderately ugly animal become instantly vilified? Watch this video of a Hyena on the coast hunting a baby Fur Seal. Of course, there’s no reason for the vilification—the Hyena’s gotta eat.

While they hunt and eat on their own, they come home to clans made of three to five other family members. Females will mate with unrelated nomadic males—just passing through—to prevent inbreeding. Cubs are raised by the whole family, and females will (begrudgingly) suckle others’ young. When the babies are on solids, the clan will bring back food for them.

They live in southern Africa, south of the Spotted Hyenas’ range. They prefer semi-arid environments, though some live on the Namibian Coast¹. They can survive close to urban areas, which is what gets them in trouble. People will find them feeding on dead livestock, and assume the Hyena was the killer. ARKive states: "The brown hyena is a poor hunter, but will often make feeble, frequently unsuccessful, attempts to catch any small animal it encounters." Does that really sound like something that would take down a thousand-pound cow? This kind of persecution lead to the Brown Hyena being listed as Vulnerable by the IUCN.

It's not listed as Vulnerable anymore. Education programs have lead to farmers reconsidering their views on Hyenas. That, coupled with the maintanance of large conservation areas have helped the Brown Hyena back from Vulnerable; it is now listed as Near Threatened. If this continues, it might end up as another "Conservation Success Story," like the Bald Eagle and Lake Sturgeon.

¹One would assume that those are the ones catching the Fur Seals, unless the baby was really lost, and meandered 500 miles inland.

When I Get Home

I know, I know. The monthly idea didn't work out so well and I ended up missing August (and almost September). Expect a post in October, or, better yet, suggest an EUT for me to write about. Phantom Midge suggested the Oregon Forestsnail (Allogona townsendiana), but the blog that she linked to was well written enough that I don't think I would have much to add. So, a random ARKive search turned up a big beetle that is one heck of a homebody.

Image from the Zoological Institute of St. Petersburg

This is the Frigate (or Frégate, depending on your language) Island Tenebrionid Beetle (Polposipus herculeanus), and it is the largest known tenebrionid in the world. For all of you non-coleopterists out there, tenebironids are better known as Darkling Beetles¹, and their larvae are far better known as mealworms. In day to day life, mealworms are seen in two situations: you either have a pet insectivore², or you have flour that has been in your pantry far too long.

Now that we know a little about the family, on to the Frigate Island Beetle itself. Sources give it's length as 20 to 30 mm. That might not seem like much, but look at that picture again. That's not a small beetle. They are completely flightless--probably due to their size--and don't get around much. They spend the entirety of their lives on a few dead trees in a small area. The absolute farthest that they've recorded this beetle traveling is a whopping 19 meters³. The beetle is apparently able to find all its life needs on the few dead trees within those 19 meters. I haven't found what it eats, exactly; I wouldn't be surprised if scientists weren't sure. Looking at its kin, I would guess that the rotting trees are their main food source.

The Frigate Island Beetle has a fun defensive mechanism that I wish I had a visual for. It will, when threatened, exude a purple, stinking, staining chemical. I'm sure the t-shirts of the visiting entomologists look lovely after a day of research.

Frigate Island itself is a tiny island within a larger archipelago called Seychelles, just north of Madagascar. Of course, being from a small, pretty tropical island means that two things are threatening the beetle population: habitat loss and invasive species. A recent program to eradicate the rats (it's always rats) was succesful. Cooler still, the London Zoo has a breeding program, and you can even (figuratively) adopt a Frigate Island Beetle.

By the way, the Coconut Crab is also from Seychelles, and is listed as Data Deficient. It will likely get a post in the near future.



¹Not Darkwing, Darkling!
²I, for example, have a tub of 50 in my refrigerator for my Leopard Gecko.
³Even for a beetle, this is small. The American Burying Beetle is not considered a distant traveling beetle, and is about the same size as this one, but can travel two miles on the scent of carrion.