Eyes on Ears and Mouth on Toes

Despite the clever if misleading title, we will not be talking about mouths on toes today (although many creatures such as butterflies can taste with their feet).  I just said that to make it sound like the line from the classic song "Head, Shoulders, Knees and Toes" by Bob Dylan.  Instead, we are going to be talking about eyes on ears: eyespots, at least!

A picture of one of the Amur tigers at the Denver Zoo.  See those white bars surrounded by dark fur on the ears of the cat?  Those are the topic of today's discussion.

On the cover of the August/September issue of the National Wildlife magazine, there was a picture of a drinking bobcat, its ears folded back in the posture that some refer to as "airplane ears."  On both of its ears were two white bars that made the ears look a lot like eyes.  I never really paid attention to this pattern on the coat, but once my friend Aidan Cook pointed it out, it got the proverbial gears going.  I remembered that servals also had the eyespot-like patterns as well, but did other cats?  Turns out a lot of them do, with just a few shared throughout the post.  Notice how defined the eyespot is in both the bobcat (top) and the serval, below.

To learn more, I consulted my "Wild Cats of the World" book by Mel and Fiona Sunquist.  The authors state that many cats have this pattern on their ears, "almost as many species" have the ear eyespots that are "poorly defined or absent."  One of the many examples that they include is the lion.  As you can see in the pictures below, lions do have this pattern to a certain degree, but nowhere near as derived as in the serval or the bobcat.  Below we have pictures of a young adult male lion, two of females, and one of a cub, and you can see that none of them have a very well defined eyespot.

Mountain lions also generally don't have it as well defined.  It seems like some mountain lions really don't have that much black on their ears at all, and some have a higher degree of black and white.  Presumably, whatever the function the eyespot serves in other species, it is not as important for the mountain lion, and natural selection therefore does not favor it highly one way or another.

It's a little tough to tell in the picture below, but the sand cat is another one of those cats that has a poorly defined eyespot.

Cheetahs also don't have terribly well defined eyespots.

Yet another cat that does not have very well defined eyespots, the ever fantastic Pallas cat!

I thought I had read somewhere that the eyespots served to help communicate between individuals when they were hunting.  This doesn't make that much sense, though, because most cats are solitary individuals, with the main exception being lions, and we already noted that their eyespots are not quite as specialized.  The Sunquists state in their book that the exact function of the eyespots is unknown, although some scientists believe that they serve as a "follow me" signal to their young, which "may be especially important in low-light conditions."  I assumed that this might mean that the young cats wouldn't have the eyespots, but this is clearly not true, as you can see the photograph of Sochi, the new male Amur leopard cub at the Denver Zoo.  There, you can see that Sochi (named after the Russian city that is holding this years Olympics) also has the ear spots.  So while this doesn't necessarily support the idea of a "follow me" signal to the young, it doesn't really not support it either: it's just something interesting that I wanted to point out.

We already talked about how tigers have a pretty well developed eyespot, but here are two more pictures of tigers to drive the point home.

I can't remember for certain if the picture below was a bobcat or a lynx, but I am pretty certain it is a bobcat, looking at the size of the feet.  (Lynx spend a lot more time in the snow, and therefore have larger feet, a snowshoe-like adaptation to keep them from sinking in.)  This cat, one of many at the Wild Animal Sanctuary, seems to have much smaller feet in proportion to the rest of the body.  Regardless, you can see the well defined eyespots.

The snow leopard, one of my favorite cats, has well defined eyespots as well, which you can kind of see in both of these pictures.

Photo Credit: Masaki Kleinkopf 

The fishing cat is another cat that has these well defined eyespots.

And finally, the Canadian lynx, much like its bobcat relative, also has pretty well defined eyespots!

Works Cited:

The Zanzibar Leopard: A Lesson in Island Dwarfism....and Extinction

Very few people have heard of the Zanzibar leopard, unless of course you are a person from Zanzibar, an island ecologist interested in insular leopard populations, or you are another Zanzibar leopard.  (Which might be problematic, being another Zanzibar leopard, but we'll get to that later.)  In the meantime, let's look at what makes the Zanzibar leopard so special: its size.

When a population of animals becomes trapped on an island, they have to adapt or die: it's just that simple.  While many populations simply succumb to death, other populations of animals can sometimes shrink over the course of many generations, eventually becoming dwarfs of their former selves.  It's called island dwarfism, and it's happened many, many times throughout the history of life: the dwarf dinosaurs of Hațeg; the Channel Islands pygmy mammoth and the Channel Islands fox; the Cozumel Island fox and the Cozumel Island raccoon; and many, many others.  The subject of today's post is (you guessed it!) the Zanzibar leopard and, as you also might have already guessed, this particular leopard is an island dwarf!  

The leopard (Panthera pardus) is simply a fascinating animal.  Able to drag prey weighing more than three times its own weight in some cases, this mid-sized feline is the midnight stalker of the African savannah.  An occasional man-eater, there are numerous sub-species of the leopard, although no one can quite agree just how many there actually are.  While some people claim that there are just a few sub-species, others have claimed that there are around thirty!  However, most scientists agree that, at least for now, there are only eight or nine sub-species.  For regular readers of the blog, you've actually met a few of these sub-species already!  Probably the most famous, the African leopard (P. pardus pardus), was featured in a post about a year ago, entitled "Predators of Baby Leopards: You Might Be Surprised," in which we talked about....well, just read the post for yourself!  More recently, we met the Amur leopard (P. p. orientalis) in a post entitled "An Amur Leopard Upchucks."  I'm pretty sure you can figure out what that post is about all on your own.

There is some debate about whether the Zanzibar leopard is simply a separate population of the African leopard (P. p. pardus), or whether it is a distinct population defined by genetics.  When it is defined as a separate sub-species, the Zanzibar leopard has the scientific name of Panthera pardus adersi.  We'll talk more about this genetic confusion later: but that's enough about the genetics,  let's get to the interesting stuff!

Scientists think that the Zanzibar leopard has been isolated from the rest of the African leopard population on the mainland since the end of the last Ice Age, at which point global sea levels would have risen, cutting off the two main islands of the Zanzibar Archipelago, Unguja and Pemba, from the mainland.  Unguja, which is informally known as Zanzibar, is where the Zanzibar leopard can be found: at least, it used to be found there.

Remember when we were talking about how scientists can't really agree on whether the Zanzibar leopard is a distinct sub-species or not?  Well, their research is not aided by the fact that the Zanzibar leopard seems to be extinct.  Following the Zanzibar revolution in 1964, the government began a program to eradicate the Zanzibar leopard, both to stop apparent live-stock killings attributed to the cat, as well as to eliminate the leopard as an apparent source of witchcraft.  Research conducted in 1996 indicated that the leopard still survived on the island, but more recent research in 2002 has found no sign of the leopard.

Adapt or die: that's the mantra of the island animal.  When you throw humans into the mix, unfortunately its the second option that seems to occur most often.  Thousands of island animals have been exterminated by humans as their habitat is destroyed in the name of progress.  With nowhere else to go, they die out, leaving behind a legacy of destruction.

This was the birthday post of Ted Neher! Happy birthday, Grandpa! If you have a birthday coming up, just email me the date at cuyvaldar123946@gmail.com with the date and your favorite animals, and I will do my best to get a post in! And if you like what you are reading, please feel free to follow us here or via Facebook!

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An Amur Leopard Upchucks

On Saturday, January 26th, my father and I drove down to Colorado Springs to see a few of my friends perform in the Colorado All State Jazz Band.  Before the concert, we met up with my grandma and grandpa, and went up to the Cheyenne Mountain Zoo for an hour or so.  We saw a few cool things, all of which I will share with you in the next post, but this post I wanted to devote to the "Critically Endangered" sub-species of the leopard, the elusive and mysterious Amur leopard.  Fewer than thirty of these amazing creatures are thought to be alive in the wilds of southeastern Russia and northeastern China, in the Primorye region.  Poachers have taken an immense toll on the numbers of this cat, as its pelt is highly prized.  Like that of the snow leopard, another fairly large cat that also lives in a very cold, harsh environment, the Amur leopard has a very soft and, for lack of a better term, floofy, coat.

The Amur leopard prior to its little....episode.

Since the number of people who see an Amur leopard in the wild per year could almost certainly be counted on one hand, you are very unlikely to see this animal lose its lunch.  For that, you would have to go to a zoo. Now, don't get me wrong, we didn't go to the zoo just to see animals throw up, but it was definitely an interesting addition to our day!  I do hope that the poor animal is feeling better, though.  If you want to see the video of the animal barfing, click on the link below.  It's not actually as gross as it sounds, trust me!  Also, please enjoy some pictures of the beautiful cat PRIOR to its cookie tossing.  

The leopard recovers after it loses its cool

Denver Zoo 7/20/2012

Ok, a little off topic, I know, but please, everyone reading this blog, go see the new Batman movie.  Words fail to describe it.  Now go.

OK, back on topic.  Yesterday, a couple of friends and I visited the Denver Zoo and the Denver Museum of Nature and Science.  While I had already seen their new Toyota Elephant Passage, I did get to see a couple of things that I didn't get to last time, some of them not actually at the Elephant Passage.  Although some of the pictures are not very good at all, I would still like to share a few with you.  One of the most exciting things of the day was the new Amur leopard cub that was born recently.  With only around 30 individuals remaining in the wild, the Amur leopard inhabits the Primorye region of southeastern Russia, and is labeled "Critically Endangered" by the IUCN.  unfortunately, all of my pictures of it were terrible.  I didn't get to see the clouded leopard (JUST LIKE LAST TIME.  DARN), but I did get to see the fishing cat!  Native to Pakistan, India, Nepal, Bangladesh and Sri Lanka, the fishing cat is definitely one of my favorite animals.  So here are some pictures, enjoy! 

Elephant demonstration

Asian elephant catching lemons in its mouth.

The "Endangered" fishing cat.  Unfortunately, I didn't get to see the clouded leopard again, just like last time.  Darn. 

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