Showing posts with label Tree Kangaroo. Show all posts
Showing posts with label Tree Kangaroo. Show all posts

Monday, April 15, 2013

23-Fact Tuesday: Strange Evolution of the Wild Pacific

So the other day, I enjoyed a Discovery/BBC program entitled "Wild Pacific," all about animals and humans in the Pacific.  This episode was entitled "Strange Evolution," and boy, were some of these guys strange!  Let's take a 23-Fact Tuesday look at some of these bizarre creatures!  Allons-y!

1.  The dingiso, a bear-faced, dog-sized tree kangaroo native to the rainforests of New Guinea, only became known to science in 1994, showing that there are still many, many fascinating natural phenomenon that have yet to be discovered by humans!

2.  Prior to the arrival of humans on Hawaii, it has been estimated that only one new species of animal or plant washed up on the shores every 35,000 years!

3.  With few terrestrial predators on the islands of New Zealand, the Fiordland crested penguin has moved from nesting along the shore to nesting within forests, moving along freshwater streams to reach their nests!

4.   The young of the Fiordland crested penguin are, of course, born in the forests.  They don't actually see the ocean (although the nests are usually close enough to hear and smell it) until they are about three months old, at which time they embark on their very first fishing trip: alone!

5.  On the island of Santa Catalina in the South Pacific, local fisherman fish in a simply fascinating fashion: they actually use spider webs from the golden orb spider that are reportedly as strong as kevlar to capture fish whose mouths are too narrow for conventional fishhooks!  Click on the link HERE to watch a short and fascinating video about this!

6.  Prior to human colonization of New Zealand, the only mammals that made it to its shores were bats and marine mammals.

7.  With so few terrestrial predators, one bat, the short-tailed bat, actually spends much of its time on the ground, foraging through the leaf litter, searching for the flightless weta, a relative of the locust.  In order to prevent damage to their delicate wing membranes, the short-tailed bat has developed special sheaths on its wings.  Interestingly, this terrestrial foraging behavior is probably very similar to how the bat's mouse-like ancestors behaved.

8.  The flightless kakapo is the world's largest parrot, and has developed sensitive whiskers on its face in order to help it navigate its way through the dark.  It's nocturnal behavior, as well as its size I would assume, has earned it the nickname "the owl parrot."

9.  The favorite food of the kakapo are the tiny seeds of the rimu tree and, since the bird is flightless, it has developed strong claws to help it climb up into the trees to reach the seeds.  Interestingly, the kakapo only breeds when the trees produce a "bumper crop," which is only about once every four years or so.

10.  Due to this odd cycle of breeding of the kakapo, the bird reproduces less often than almost any other bird.  By contrast, however, it lives longer than most others, sometimes up to 60 years!

11.  During breeding season, the male kakapo makes a "booming" sound to attract a female.  The male booms nonstop each night for 8 hours a night for up to three nights, resulting in thousands of booms.  The wind can carry the booms for up to three miles!  The female, of course, only responds to the males booms if the rimu seeds are plentiful.  Click HERE to check out some footage of the kakapo booming.

12.  LAST KAKAPO FACT, I PROMISE!!  The kakapo was almost hunted to extinction by humans for food and feathers, but they are making a human-assisted comeback now, climbing from only 51 individuals in 1995 to 91 individuals today!  (Possibly more, as I believe the television program is a year or two old or so.)

13.  The Australian brushtail possum was imported by colonists for fur to New Zealand over two centuries ago.  With no natural predators, however, it has spread like a plague, stripping trees of their vegetation.  About 70 million of them are estimated to inhabit the forests now.  That's like 350,000 a year, not including the ones that died.  Holy.  Cow.

14.  Introduced species can cause terrible problems to insular (island) ecosystems.  One of the most extreme examples is thought to be Easter Island, where it has been hypothesized that rats were what did in the colony.

15. For nearly 100 million years, the tuatara and its ancestors have remained almost entirely the same.  During the time of the dinosaurs, the tuatara's ancestors were very numerous, but following their extinction 65.5 MYA, they just couldn't compete, and were slowly extirpated across the globe.  Except in New Zealand, where they still reside today!  Incredibly, the tuatara sometimes can go an entire hour with only one breath!

16.  60 MYA, what is now the island of New Caledonia broke off from Australia, and is now 800 miles from the mainland.  This has allowed its native fauna to evolve in new and fantastic ways: such as the flightless, chicken-sized kagu, the only extant member of an ancient lineage.  HERE we have a fantastic video of this ridiculous bird!

17.  The monkey-tailed skink is the largest skink in the world, and is native to the Solomon Islands, an archipelago of nearly 1,000 tropical islands).  The monkey-tailed skink grows to around 3 ft. in length and weighs around 2 lbs., which is about 1,000 times heavier than the world's smallest skink.

18.  The monkey-tailed skink is an oddity amongst skinks.  Not only is it the largest skink in the world (as we mentioned above), it is also the only skink in the world to have a prehensile tail, which it uses to grasp branches while climbing in trees, assisted by its thick, sharp claws.   This is also an oddity, as most skins are terrestrial (meaning they live on the ground), as opposed to arboreal (which means that they live in the trees).  Furthermore, most skinks are insectivores, while the monkey-tailed skink is mostly vegetarian, consuming the leaves in the trees.

19.  The New Zealand kea, named for its call and native to the southern Alps, is considered to be one of the most intelligent and playful birds in the world.  As a matter of fact, some keas will damage cars out of curiosity!

20.  Up to thirty non-native species arrive on Hawaii every year due to humans, such as the Jackson's chameleon, native to east Africa, which was imported in the 1970s to Hawaii as an exotic pet.

21.  Another biological organism introduced by humans to Hawaii was sugarcane.  Like most places that humans visited, however, they also accidentally introduced rats.  And the rats ate the sugarcane.  Well, the humans who were trying to make a profit off of the sugarcane didn't like that, not one bit.  So, in the hopes of extirpating the rat population, the humans introduced the Indian mongoose.  However, what the humans failed to take into account was the fact that the Indian mongoose is diurnal, or lives during the day....while the rats are nocturnal, and move around at night.  So instead of eating the rats, the Indian mongoose eats the native birds.  Hawaii: 0.  Human Stupidity: A whole lot more than it should be.

22.  The ancestors of the I'iwi, a long billed honeycreeper endemic to Hawaii, were blown to Hawaii about 4 MYA, and looked very different from what they looked like today.  It is thought that they looked something like the Palila, a short billed finch that uses its tough beak to tear open tough seed pods.

23.  The last fact isn't from the program.  It's from "The Song of the Dodo" by David Quammen, one of my favorite books of all time.  It's a quote: "Islands are where species go to die."  He means that islands can be very dangerous places for animals to live.  But now with all the messes humans have introduced, that effect has been exasperated.  Just something to think about.

Saturday, February 2, 2013

Top Ten Most Interesting Arboreal Mammals (Part 2)

Welcome to Part 2 of the Top Ten Most Interesting Arboreal Mammals in honor of the birthday of Charlie Bowers!  FYI, for those of you who don't know, arboreal means an animal that lives in the trees!  For Part 1 of this duology, click HERE.

5.  Fossa - The fossa has one of the most interesting and amusing scientific names: Cryptoprocta ferox.  Any guesses as to what that means?  If you guessed "Fierce Hidden-Anus," then you are spot-on!  Native to Madagascar (and, in fact, the largest carnivore of the "Lost Continent"), this cat-like creature is not actually a cat.  Instead, it is closely related to the civets and the genets, like the binturong.  To see a video of how incredibly acrobatic the fossa is, click HERE

4.  Cats - We talk about cats a LOT on this blog, and we are going to talk about them again today!  Quite simply put, cats are quite possibly the most acrobatic group of carnivores in the world.  Many of them are acrobatic on the ground (like the caracal, serval, and cheetah), while others are acrobatic in the trees.  Some of these are larger cats, like the leopard and the jaguar.  Others are smaller cats, like the ocelot and the margay, the latter of which can rotate its ankles around 180 degrees in order to climb down the trunks of trees head first!

3.  Ringtail/Cacomistle -  A member of the raccoon family Procyonidae like their relatives the coatis and olingos, the ringtail and the cacomistle are pretty obscure animals.  The ringtail actually lives as far north as southern Oregon, and throughout the southwestern United States, as well as in Mexico.  The range of the cacomistle actually overlaps that of the ringtail in Mexico, but the cacomistle also lives as far south as Panama.  They are both omnivorous, and insects, fruits, arthropods, and small vertebrates are important components of their diets.  They are also both listed as "Least Concern" by the IUCN.

2.  Tamandua -  Like all anteaters, the tree anteaters, such as the tamandua (pictured above) have very strong, large, and powerful claws, made to access the nests of ants.  These claws also happen to be perfect for climbing.  It's tail, like many other arboreal creatures, has evolved to be prehensile, which is an enormous benefit when climbing in the trees.  This fifth limb, if you will, is especially important when the tamandua has to tear into the bark of trees to expose the tasty insect treats within, helping to keep the tamandua from falling from the trees.  The tail is actually powerful enough to support the weight of the entire animal!  You don't often think of anteaters climbing around in the trees, which is why I think that the tree anteaters are excellent candidates for our number two spot on the list.  To see a video of the tamandua in action, albeit in Russian or something (it doesn't really matter, just watch without audio or something, but make sure to watch from 1:00 onwards) click HERE.

1.  Tree Kangaroos - Sometimes, nothing is quite as funny as a kangaroo.  But imagine a smallish kangaroo hopping around in the trees, a hundred feet or more above the ground.  Believe it or not, such a thing exists!  Having evolved from the rock-wallabies (who are in turn thought to have evolved from the pademelons), the tree kangaroos are pretty awesome creatures!  Reportedly pretty clumsy in the trees, it is hypothesized that, if there were any significant predators in the area (like many of the carnivores that we have been talking about in these two posts), the tree kangaroo would have either have had to evolve, or they would have been hunted into extinction by these predators.  Since it is so clumsy, and it spends so much of its time between 70 and 100 feet above the rainforest floor, the tree kangaroo has adapted to large and significant falls from high in the sky.  They can fall around 60 or 70 feet with no physical harm!  Don't believe me?  Once you click the video link HERE to learn more, go ahead to about 5:10 if you want the skinny.  You will be able to enjoy a tree kangaroo falling!  And don't worry, it won't be hurt: just check out the video!
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