Recently in Mammals Category

The Endangered Snow Leopard

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Snow-Leopard.jpgIn the deep dark chasm,
Upon the sides of the walls,
Motion with lightning's shape and speed,
And before it the swift deer falls. 

Its color blended ever light,
Gray white and shades of dun,
Streamlined shape and hunter's eye,
And incredible speed to run. 

Against a snowy background,
Imposing yet serene,
The fearsome leopard of the snow,
Can hardly yet be seen. 

-Katrianna Sarkar

Snow leopards are endangered from causes such as the trade in its pelt and global warming. The fur is made into coats and hats, and their bones and other body parts are also used in traditional medicine. Tigers are supposed to be used in the practice of traditional medicine, but they are already so rare (their populations have lessened from this too) that the more common snow leopard is substituted. 

Their numbers are hard to estimate, due to the fact that snow leopards live in rugged, remote terrain. This makes conservation more difficult, so an interesting device was employed. With as few snow leopards as there are, you can tell the individual leopards by their spots.  As a result, pictures taken by a remote camera are compared to those in a photo library. In that way, they can estimate how many there are.

As elusive as snow leopards are, we still know quite a bit about them:

Wild sheep and goats are the snow leopard's main food, as well as an occasional buck or rabbit.

A snow leopard can leap thirty feet.

Snow leopards have enormous, furry tails. They use them for balance, but if they get cold they can wrap their tail around themselves.

Snow leopard cubs have blue eyes. When they get older, snow leopard eyes get grayer.

Let's hope we can save them. We should start conserving energy by using solar power and stop buying coats made from snow leopard, or, for that matter, any other kind of fur.

Fascinating Facts About Red Pandas

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red panda.jpgWhen most people see the word "panda," they think of the big, furry, black-and-white Giant Panda. But the lesser-known Red Panda, three times smaller, is also in danger. Today classified as vulnerable, its status could quickly change to endangered.
 
The red panda is a living fossil. It has no close surviving relatives, and most resembles raccoons and skunks, not giant pandas. Living in temperate (neither tropical nor arctic) mountain forests from Nepal to China, they spend most of their time in trees. They are both nocturnal and crepuscular, meaning that they come out in the early morning and evening. The red panda is also called the cat-bear, lesser panda, and fire fox. The browser "Mozilla Firefox" was named after them.

Their diet is two-thirds bamboo, but they also eat acorns, flowers, berries, lichen, mushrooms, roots and grasses and occasionally insects, fish, eggs, and chicks. Like giant pandas, they have a bone that acts like a thumb, helping them hold the bamboo. However, because bamboo is low in calories, they spend most of their time eating and sleeping. They drink by dipping one paw into water and then licking it!

The red panda is threatened due to many factors. Deforestation reduces their habitat and grazing livestock can trample their bamboo. In China, they are poached for their fur, which is considered good luck by newlyweds and used in traditional ceremonies. Although the practice of capturing red pandas for zoos has ended, they are sometimes sold to private collectors and are occasionally kept as pets in Nepal and India. Even without interference in the wild, the red panda has a low birth rate and high death rate.

However, red pandas are officially protected throughout their range and hunting them is illegal. Parks protect them in every country they live in and some villages are involved in conservation, as well. Although some originally trapped wild red pandas, many zoos have developed successful captive breeding programs. If we protect them now, the red panda will flourish in the wild.

Tasmanian Devils

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Taz.jpgThe Tasmanian devil is a bearlike marsupial native to Australia. It is the size of a small dog. Young are called joeys, imps or pups. They were killed until the 1990s because they were seen as a threat to sheep and other livestock. Occasionally a pack of tasmanian devils would eat a weak sheep. So, in 1923 alone, 900,000 devils were killed.

At Lake Nitchie, a 7000-year-old human skeleton was found wearing a devil's-tooth necklace. This was mistakenly interpreted to mean that Aboriginal Australians killed off the Tasmanian devil in mainland Australia. But there is no evidence that the Aboriginal Australians ate any carnivorous animal, so it is unlikely that hunting caused the extinction. 
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Their closest relative is the thylacine, which looks like a dog. It is now extinct. The thylacine, like the Tasmanian devil, was accused of hunting livestock and a bounty was given out by the government for each thylacine killed. No attempts were made to save even the last wild thylacine. They were only protected 59 days before the last captive thylacine died. 

Even though populations of Tasmanian devils in the wild are slowly growing again, unfortunately a disease has been among them and they are having to quarantine most healthy specimens. Despite their name, Tasmanian devils can be very cute (like the one above), and we want to save them. (They are not normally considered "nice," but they are only following their instincts.) So now it's time to watch some Taz cartoons!

Mustelid Crossword

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crossword final.jpg

crossword clues FINAL FINAL.jpgFor help solving the puzzle, see Wikipedia's article.

Warning! The answers are below.

crossword answers.jpg


Why Chimps Are Intelligent

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Chimpanzees are great apes with dark fur. They are the closest relatives to humans, and have almost as much mental capacity. 

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They use a wide variety of tools: from primitive ones, such as grasses or sticks for catching termites, to advanced tools like branches, sharpened with their teeth and used to spear a bushbaby or a squirrel out of a tree. Chimps are also quite refined and use napkins (in other words, leaves). 

Here are some stories that prove chimps are more intelligent than we give them credit for:

A chimpanzee named Peter was sitting quietly in a zoo one day when some paint, brushes, and canvas showed up in his enclosure. So he painted a few paintings. Then a man named "Dacke" Axelsson picked the four best, and exhibited them in the museum under the name "Pierre Brassau." There were mixed responses: "Brassau paints with powerful strokes but also with clear determination" or the more critical "Only an ape could have done this." For the full story, check Wikipedia's article on Pierre Brassau

Once a chimp, named Nim Chimpsky, was taught to use sign language. At ten days, he was taken from his ape family for research. He was quoted carefully: "Apple me eat. " "Eat grape eat Nim." "Play me Nim play." "Finish hug Nim." His longest quotation was written as "Give orange me give eat orange me eat orange give me eat orange give me you." Unfortunately, smart little Nim was transferred from his human family and ended up at a medicine company, and later in Black Beauty Ranch in Texas. 

Bonnie the orangutan (who lives at the National Zoo) suddenly began whistling, after seeing her zookeeper do it. It is reported that she only does it because she likes to hear it, not because it might earn her a reward. Click here to listen to Bonnie whistle.

Unfortunately, chimps for circus acts and television commercials, like in the CareerBuilder Super Bowl ad, often are mistreated. Several people, I was pleased to see, were arguing over whether it was fair or not to use chimps in ads. Watch the commercial: the use of chimpanzees is rather unnecessary. 

Do You Know What Veal Is?

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A few days ago, we were in a health food store. In the frozen section, they were selling eggplant cutlets. Not only did this seem a little far-fetched as a substitute for what might normally be veal cutlets, it also brought up the question: What exactly is veal?

calf002.jpgVeal comes from male calves, as the cattle industry has little use for them (they are not raised for meat as commonly as females are). These calves are penned separately from the other cows so that their mothers cannot feed them. Often they are given only a milk-based formula. Many farms keep the calves in small, solitary "veal crates" where they cannot move around so that their muscles do not develop properly. Finally, some slaughterhouses bleed the calves to death to drain the meat of color. When an animal is given food, its meat is darker and tougher. But veal is supposed to be light-colored and tender, a result achieved by this starving, confining and bleeding.

There are, of course, problems with free-range meat. But at least the animals are allowed to move and eat while they are alive. Even people who do eat meat can stop supporting the production of veal. If there is no demand for it because people refuse to eat it, the farmers will have no reason to continue these practices.

But back to the eggplant cutlets... Being a vegetarian or a vegan means that a person cares about animals and does not want to hurt them. Why would these people intentionally imitate such an industry -- especially if they have to eat eggplant to do it?

Black-footed Ferrets

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blfofe.jpgBefore 1851, no one had heard of a black-footed ferret. That was the year in which John James Audubon and John Bachman wrote a book together titled The Quadrupeds of North America. This was the first work to mention the species, but it was still more than twenty-five years before their existence was proven. (Audubon, who sometimes killed fifty birds of one species to produce one painting, only got to see one ferret while working on his book, which was not enough evidence to prove that the black-footed ferret was a new species.)

Although they lived throughout the Great Plains, the ferret population has been falling ever since we first knew about them. One reason for this is that the ferrets are so dependent on prairie dogs, a species of ground squirrel. Not only are these rodents their staple food, the ferrets also cannot dig their own burrows and are squatters in prairie dog towns. When settlers moved west, many became farmers. They plowed under the prairie dog towns and hunted or poisoned many of the animals. Both the prairie dogs and the ferrets grew increasingly fewer.

Then, in 1981, a Wyoming dog named Shep found a ferret. Eventually, the animal was identified and its colony -- of about 130 animals -- found. However, this population quickly plummeted due to canine distemper and sylvatic plague. In 1986, the remaining 18 animals had to be removed from the colony. The ferret was extinct in the wild.

At this time, there were only fifty captive black-footed ferrets in the world. After years of captive breeding, the first place to reestablish a small colony was Wyoming in 1991. Now, there are fifteen established fesnyngs (or businesses: the name for a group of ferrets) in the wild, in eight US states as well as Mexico and Canada.

There are, however, still threats to their survival. Their close relationship with prairie dogs does not aid their recovery. Prairie dogs are often viewed as pests because they prevent farmers from growing crops in certain areas by rooting up the plants around their burrows. Their tunnels also make the ground less stable and more prone to collapse if animals are turned out to graze.

Because of these things, many people dislike prairie dogs. Even today they are hunted, both commercially and privately. To eradicate colonies, they are poisoned, which indirectly affects many other species. Two of the popular poisons, Rozol and the recently approved Kaput-D, contain chemicals that thin the prairie dogs' blood until they bleed to death. Not only is this horrible for the prairie dogs, any animal that eats them will encounter the same fate. Black-footed ferrets, swift foxes, American badgers, ferruginous hawks, and golden and bald eagles all prey on prairie dogs. An infected animal is easy to catch because it becomes unable to move quickly or control its motions, so many of these predators are suffering secondary poisoning. Additionally, mountain plovers and burrowing owls live and nest in prairie dog burrows and can also become infected.

Another threat to ferrets is disease, particularly sylvatic plague. Luckily, the animals can be immunized against the disease, and all ferrets born in captivity are required to be given two shots of the medicine. Although prairie dogs are also susceptible to this, it has been found more difficult to protect all of the wild colonies from the bacteria. One widespread method was to spray each burrow with flea-killing pesticides, but scientists realized that this was probably too expensive and hard to do and maintain. There had to be an easier way to accomplish this. Finally, they developed a medicine that could be mixed in with food left for the prairie dogs to eat. This also proved more efficient than the pesticides. Additionally, these studies will benefit other species susceptible to the sylvatic plague, both wild rodents and some pets.

There are now more than 1,500 ferrets throughout the established colonies, so the species has been upgraded from extinct in the wild to endangered. Although the number is low, it is still a success considering how few animals lived at one point. Black-footed ferrets are considered the most endangered mammal in North America, but the numbers are still rising to the extent that they may become relatively common over time. The current ambition is to establish ten breeding populations in the wild. When this is met, the ferret can be listed as threatened, instead of endangered. When this happens, the ferret will have returned.

Bear in Terrain

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bear.jpg"Look," Mikaela cried as we glimpsed a furry, brown leg, "A bear!"

We all ran out onto the smaller balcony and looked out. A young black bear was gazing at us, puzzled. Mom was leaning out the bedroom window taking photos with her new camera, and I was taking some pictures as well.

He was young. The year before we had discovered him, just an overgrown cub, at the fork in the unpaved road where our steep driveway met the neighbor's. Now he was bigger, we noticed, as he crossed the "animal highway." This was where deer and coyotes, but never before a black bear, made their crossing behind our house.

He loped off the other way and disappeared into a myriad of bushes and berries. He was gone.

Black bears are smaller than grizzly bears and do not have as defined a shoulder hump as their relatives. Grizzly bears' humps are shoulder muscles useful for digging up roots. Grizzly claws, partly for the same reason, are larger than black bears' claws. Signs that a bear has been somewhere are digging sites, clawed trees, and tracks which have five toes and look heavy. (The main hand is a thin egg shape with a little triangle at the end.)  A black bear is eighty-five percent vegetarian, and most of the carnivorous percentage consists of bees, ants, and yellow jackets.
 
Kermode Bear Planet Green.jpgThere is such a thing as a Kermode or Spirit Bear. These are rare, white subspecies. Only one in ten are completely white, and some are tan with patches. It is very special to see a Kermode bear. They are not albino, however, and are white because of a recessive gene. Other subspecies include the Eastern black bear, the Florida black bear and the Newfoundland black bear. The Florida black bear deserves special attention because it is threatened. At first, the Fish and Wildlife Department declared it threatened except in areas where it was a game animal. This was a rather hypocritical statement, as a bear could be passing a hunting area, though it was born in a refuge. Probably the Fish and Wildlife Department realized that after the criticism that they got. The Florida black bear is listed as threatened wherever it occurs.

In the case that you meet a black bear on a trail, rangers advise you to put up your hands and raise a backpack (if you have one) above your head to frighten it off. Do not do this unnecessarily, like if you hear rustling in the bushes a ways off the trail. However, do talk or clap your hands in such cases. Finally, if a black bear attacks you, fight back.

Harboring Harbor Seals

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harborseal.jpgThere's a good reason why the harbor seal is also called the "common seal." They're found all over the northern hemisphere's coastlines, in the Pacific and Atlantic oceans and throughout the North and Baltic seas. They are also the most widespread pinniped, a term which refers to true seals, eared seals (sea lions and fur seals), and walruses. (Neither true seals nor walruses have ear flaps, known as pinnas.)

Harbor seals are true seals. They have small flippers that do not rotate and consequently have a hard time moving around on land. They rely on layers of blubber for warmth, buoyancy, and extra energy. The blubber also allows the seal's skin to be the temperature of the water surrounding it, while their core temperature, or how warm they are inside, is 100° F. They have large eyes, but most scientists think that their color vision is very bad, if existent. Harbor seals have better eyesight than humans underwater, but worse on land. Since blind seals have been found with pups in the ocean, scientists believe that sight is unimportant to harbor seals. Although they usually stay closer to the surface and come up for air once in ever three to seven minutes, they can dive 1,500 feet underwater and stay submerged for 40 minutes! Mostly, these seals catch fish, but sometimes when they've gone that deep they'll eat shrimp, crabs, mollusks, octopods, and squids.

Harbor seals spend approximately half of their time in the ocean, and the other half on land. Although they typically stay in the water only when feeding, they have been known to sleep in the water, too. Places where they regularly rest on land are called "haulouts," and the process of a seal climbing up onto the land is called "hauling out." Unfortunately, if people repeatedly disturb them they will abandon their haulouts or even their babies. Sometimes, seals dart into the sea as soon as they see or hear people. That's why beaches often post signs warning people to stay at least 100 feet away from the seals and use binoculars or cameras. Goat Rock Beach suggests 150. The Point Reyes National Seashore website advises visitors to come no closer than 300 feet.

To attract a mate, male seals will form a group, put their heads together and call the females. It is thought that the females select the strongest males. Although they can be seen at any time of the year, the best time to view harbor seals in California is probably from February to April, when they are having their babies. In the Arctic, they may wait until July! Young seals are called pups and usually born with a spotted coat. If you see a pup with a white coat, called a lanugo, it was born prematurely. (In the Arctic, the pups are born with the white fur but molt soon afterwards.)

sealsgoatrock2.jpgHarbor seals haul out on many beaches. We saw them in February on California's Goat Rock beach. (The origin of Goat Rock's name is disputed. There is a very large rock connected to the beach by a thin strip of land, and the most popular theory states that goats used to be permitted to graze on the rock because they were the only species surefooted enough to climb it.)

The Californian or Pacific harbor seal is a subspecies of harbor seal found along the entire coastline of California. In the San Francisco bay, some seals appear reddish. This unusual coloration is thought to result from tiny quantities of elements, such as iron or selenium, in the water.

Some field guides make it sound like it is very difficult to tell a harbor seal from a sea lion, but it is actually very simple. Harbor seals are usually light gray, and sea lions are dark brown. The sea lion is able to flip its flippers forward so that it can walk on land. For the most part, the seals lie on the beach, while the sea lions sit up on their front flippers and grunt. Additionally, studying a photo of any animal beforehand will help you identify it in the field.

The worldwide population of harbor seals is five or six million. Hunting seals is illegal throughout most of their range, but certain subspecies are threatened. Besides people disturbing them on beaches, the seals are caught in fishing nets and hit by boats. They are endangered by chemicals dumped in the water or released by power plants. Diseases such as the phocine distemper also threatened them. And while it is illegal in the United States to hunt harbor seals, if a seal is thought to endanger a fishery it can legally be killed. Happily, however, the numbers of harbor seals have been rising on the east coast of the US, and some have even been spotted in Florida. With care, these seals will continue to haul out throughout their widespread range.

Santa (Dew) Claws

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Rudolph Red-Nose Reindeer.jpgYou probably remember the names of the nine famous reindeer doing warm-ups this season: Prancer, Dancer, Vixen, Comet, Cupid, Donner, Blitzen, Dasher, and, of course, Rudolph. But most likely you don't know the following interesting facts about caribou. (Which are really the same thing. You must caribou about that.)

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Did you know that Aristotle, Theophrastus, and Julius Caesar all saw reindeer? Caesar's description of it was:

"There is an ox shaped like a stag. In the middle of its forehead a single horn grows from between its ears, taller and straighter than the animal horns with which we are familiar. At the top this horn spreads out like the palm of a hand or the branches of a tree. The females are of the same shape as the males, and their horns are the same shape and size."
                -Commentarii de Bello Gallico (Chapter 6.26)

Female reindeer stay in herds. Males are solitary, but join the girls during the breeding season. Like elk, the males win a group of females by rutting. Male reindeer horns fall off in the winter, but female horns don't. 

Reindeer often make a clicking sound that leads people to think they have hurt ankles. However, this species of deer has dew claws (these look like high heels) on the hooves. This sound is normal. Perhaps reindeer think they're cool tap dancers for doing it. 

Reindeer have predators: wolves, wolverines, bears, and coyotes. Reindeer prey on lichens, sedges, and other grasses, digging them out with their hooves in winter. In captivity, they are fed grains.

And, just to be on the safe side, I'll say most. But most reindeer do not have red noses!

About this Archive

This page is a archive of recent entries in the Mammals category.

Invertebrates is the previous category.

National Parks is the next category.

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