Hiển thị các bài đăng có nhãn Squirrel. Hiển thị tất cả bài đăng
Hiển thị các bài đăng có nhãn Squirrel. Hiển thị tất cả bài đăng

Chủ Nhật, 16 tháng 12, 2012

Belomys pearsonii
Despite being first described in 1908, not much is known about the Hairy-footed Flying Squirrel, due to their habitat and behavior. These rodents live in central and southern Asia, inhabiting deciduous forests at elevations of between 1500 and  2400m. They also happen to be nocturnal, which makes them difficult to track.

Name for the long hairs on their feet (that keep them warm in cold seasons), Hairy-footed Flying Squirrels have a body length of around 9in, and a tail that is only about 5. Their fur is reddish-brown on the top, with lighter undersides. They live in tree hollows.

We don't really know how well the Hairy-footed Flying Squirrel is doing out there, since they are so little studied. It is believed that their population is on the decline, due to habitat loss from logging and agricultural use.

IUCN Status : Data Deficient
Location : Asia
Size : Body length around 9in (22cm)
Classification : Phylum : Chordata -- Class : Mammalia -- Order : Rodentia
Family : Sciuridae -- Genus : Belomys -- Species : B. pearsonii

Thứ Năm, 8 tháng 11, 2012

Sciurillus pusillus
The Neotropical Pygmy Squirrel is an animal that really intrigues me... because I know almost nothing about it. There is actually so little recorded about these rodents that they are listed as "Data Deficient" by the IUCN. It is even difficult finding pictures of them!

Neotropical Pygmy Squirrels are the smallest of all the South American Squirrels, weighing as little as 40g. (For comparison, the Western Grey Squirrel of North American can weigh ten times that much!) They have a patchy distribution in the lowland rainforests of Brazil, Colombia, Peru, and nearby areas.

Their small sizes means that we don't see them very often, and only recently have them become subjects of study (but there is still so, so much to learn!) We have learned that they are monotypic for their subfamily, that they have very small littler sizes (no more than 2), and they probably feed on the barks, gums, mosses, and insects and grow/live in the trees.

Hopefully more studies and observations will be done in the future, so that we can learn even more about this tiny little Squirrel!

IUCN Status : Data Deficient
Location : South America
Size : Body length up to 10cm, Weight up to 43g
Classification : Phylum : Chordata -- Class : Mammalia -- Order : Rodentia
Family : Sciuridae -- Genus : Sciurillus-- Species : S. pusillus

Thứ Sáu, 26 tháng 10, 2012

Cynomys parvidens
There are five different species of Prairie Dog, with the Utah being the smallest. They also happen to be one of the most rare, and are listed as Endangered. They have cinnamon colored backs, white tails, and brown spots above and below the eyes.

Unsurprisingly, the Utah Prairie Dog is found only within the State of Utah. They, like all Prairie Dogs, are members of the Squirrel family, and they are most closely related to the White-tailed Prairie Dog. The two species may have once been a single species way back when, though they are now separate and live in different ranges (the White-tailed lives further north and east).

Utah Prairie Dogs build extensive underground burrows, and their large extended families live together within them. They live in these "towns" year round, and remain in them exclusively in the winter, though they don't take part in a true hibernation process. Utah Prairie Dogs are primarily herbivores, preferring to feed on flowers and seeds, but they will eat grasses when necessary, and will also grab the occasional insect.

The Utah Prarie Dog is considered Endangered because their population went on a large decline due to habitat loss and intentional killing. They were causing damage to crops and farmland, which led to shootings and poisonings that decimated populations. Since the 1970s, efforts have been made to move colonies from private to public land, but nearly 70% of the Prairie Dogs still live in unprotected private areas. The population is still on the decline, and it is estimated that there are around 10,000 left.

IUCN Status : Endangered
Location : Utah, United States
Size : Length up to 14in (36cm)
Classification : Phylum : Chordata -- Class : Mammalia -- Order : Rodentia
Family : Sciuridae -- Genus : Cynomys -- Species : C. parvidens

Thứ Tư, 12 tháng 9, 2012

Ratufa macroura
The Grizzled Giant Squirrel is a threatened species that is found in only a few spots of India and Sri Lanka. There are three different subspecies, and as a whole they are the smallest of the Indian Giant Squirrels.

Grizzled Giant Squirrels are named for the white flecks of hair that cover their greyish-brown bodies, giving them a grizzled look. They also have very long tails that can constitute over half their total body length, and small round ears with tufts.

Though there are Squirrels that live on the ground (I'm looking at you Marmots), this particular species lives just about exclusively in the trees. Their long tails make them great jumpers, and they can leap as far as 6m between trees! Grizzled Giant Squirrels are very territorial, and usually live alone or in pairs. They forage during the daytime, searching for fruits, nuts, insects, and even bird eggs. Pairs produce one little a year, number 1-2 offpsring.

Unfortunately, the Grizzled Giant Squirrels is listed as Near Threatened. They are hunted by humans for meat and fur, and habitat degradation has made them either lose their homes entirely, or live in thinned out forests where they are easier to spot by avian predators. They are protected in a few places, most notably the Shenbagathope Grizzled Squirrel Sanctuary in Southern India.

IUCN Status : Near Threatened
Location : India, Sri Lanka
Size :  Total length up to 35in (90cm)
Classification : Phylum : Chordata -- Class : Mammalia -- Order : Rodentia
Family : Sciuridae -- Genus : Ratufa -- Species : R. macroura

Chủ Nhật, 6 tháng 5, 2012

Marmota marmota
It's been a while since we last talked about a Marmot- those big old Ground Squirrels that tend to produce some hilarious photographs. Today's Marmot is the largest of the clan, which also makes it the largest of all the world's Squirrels as well!

Alpine Marmots are found (where else?) in the European Alps. Though I should also note that they have been introduced to the Pyrenees, the Carpathians, the Tatras, and a few other areas as well. Grassy, high-altitude plains are their preferred habitats, as they allow them to build the complex burrows systems that they live in, and to feed on the grasses and flowers that they prefer.

Marmot families are pretty close knit, are are comprised of a breeding pair and their offspring from previous years. They can number as few as 3-5 individuals, or as large as 50! There is some interbreeding within these colonies, but it is minimal as these colonies are typically female dominant, so the males only remain in a colony for a year or two (Alpine marmots can live as long as 14 years!)
Alpine Marmot

The Marmot colonies spend their active months foraging for food and preparing for their winter hibernation. They use a variety of calls and whistlers to warm one another against danger during these foraging sessions.

Did you know that these guys hibernate for half of the year? When winter comes they head into their burrow system, and the last one in plugs up the hole with grasses and dirt to keep out the cold. Infant mortality is pretty high in Marmots, so snuggling with the youngsters and keeping them warm greatly increases their chances of living another year.


IUCN Status : Least Concern
Location : Europe
Size : Body Length up to 21in (54cm), Weight up to 17lbs (8kg)
Classification : Phylum : Chordata -- Class : Mammalia -- Order : Rodentia
Family : Sciuridae -- Genus : Marmota -- Species : M. marmota

Chủ Nhật, 11 tháng 12, 2011

Funambulus palmarum
Indian Palm Squirrels are also sometimes referred to as Three-Striped Palm Squirrels, due to the patterning on their backs. They are found as a native species in India and Sri Lanka, and were intoduced to Australia where they have become quite the nuisance.

Did you know that the Indian Palm Squirrel has it's own Hindu legend? According to the story, a bridge was being built by Lord Rama, and a small squirrel decided to help by carrying small rocks and pebbles, all the while chanting Rama's name. He was so impressed by the contribution of this tiny animal that he stroked her back, leaving stripes where his fingers would've touched.

Indian Palm Squirrels are a very adaptable, and are able to live in a variety of habitats. Unsurprisingly, they have taken to urban areas just as well as wild ones. They eat fruits, nuts, insects, and eggs.

As previously mentioned, Indian Palm Squirrels have become an invasive species in Australia. They consume crops, eat the eggs of native birds, and have few natural predators. It is illegal to import, possess, or sell them within the country.

IUCN Status : Least Concern
Location : Indian, Australia (introduced)
Size : Length up to 8in (20cm)
Classification : Phylum : Chordata -- Class : Mammalia -- Order : Rodentia
Family : Sciuridae -- Genus : Funambulus-- Species : F. palmarum

Chủ Nhật, 6 tháng 11, 2011

Sciurus aberti
Abert’s Squirrels are adorable little dudes that are sometimes referred to as Tassel-Eared Squirrels (guess why). Their are nine recognized subspecies that vary in coloration and location, but most sport grey-brown coats and white underbellies.

 They live in the coniferous forests of western North America, and have a rather interesting relationship with the Ponderosa Pine tree. You see, unlike some plant-animal relationships (I’m looking at you Maned Wolf / Lobeira), the one between the Squirrel and Pine is not a perfect one for all parties involved. The Squirrels use the trees for shelter and food, but the Pines don’t really want them there, despite the fact that the Squirrels help to spread beneficial fungi to the Pines.

Abert's Squirrel
The Ponderosas that live in especially Squirrely areas secret extra chemicals to keep the critters away, and the Squirrels search for less toxic Ponderosa’s to live and feed on. Unfortunately, the Pines with higher chemical secretions have lower vitality and growth rates. It’s definitely a weird relationship!

Abert’s Squirrels are also interesting in that they don’t store food like many other Squirrels do. Rather than stash food, hibernate, and then find it all again in spring, these Squirrels are active year round and have no reason to hide their meals.

IUCN Status : Least Concern
Location : North America
Size : Body Length up to 23in (58cm)
Classification : Phylum : Chordata -- Class : Mammalia -- Order : Rodentia
Family : Sciuridae -- Genus : Sciurus  -- Species : S. aberti