Jump to content

Squirrel

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by El Mariachi (talk | contribs) at 18:44, 8 May 2007 (Background). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

This article is about the animal. For other uses, see Squirrel (disambiguation).

Squirrel
Eastern Gray Squirrel, Sciurus carolinensis
Scientific classification
Kingdom:
Phylum:
Class:
Order:
Family:
Genera

Many, see the article Sciuridae.

A squirrel (Greek, skia "shadow" and oura "tail"; "tail that casts a shadow") is a medium-sized rodent of the family Sciuridae. In the English-speaking world, it commonly refers to members of the genera Sciurus and Tamiasciurus. These typical members of the family are tree squirrels with large bushy tails, and are indigenous to Europe, Asia and the Americas. Similar genera are found in Africa. However, the Sciuridae also include flying squirrels, and ground squirrels such as the chipmunks, prairie dogs, and woodchucks. The unrelated family Anomaluridae also have "squirrel" in their common name, though they are usually referred to as "scaly-tailed flying squirrels". The word squirrel comes from the Old French ésqurial, which itself comes from the Vulgar Latin word scuriolus (squirrel). The pronunciation of this animal's name varies. The British way uses a short "i". The American pronunciation can rhyme either with "curl" or with "Merril", varying regionally.


Background

Typical squirrels include the Fox Squirrel S.niger; the Eastern Gray Squirrel S. carolinensis; the Western Gray Squirrel S. griseus; the Douglas Squirrel Tamiasciurus douglasii; and the American Red Squirrel T. hudsonicus.

The "Black Squirrel" is actually a variant of the Eastern Gray Squirrel. It is thought that the black variant developed its dark coat to better absorb heat in colder climates. Although considered rare in many areas, they can be found in the Vancouver area of British Columbia and are the dominant variety in most of Ontario, Quebec, certain areas of the Northeastern United States, and as far south as Maryland and Virginia. They are the ersatz mascot of Sarah Lawrence College. Black squirrels, appearing to be identical to the red squirrels in the area, are also fairly common in the midwestern United States, particularly in some communities in southwestern Iowa, such as Council Bluffs, Manilla, and Missouri Valley. Black squirrels may also be found in Marysville, Kansas; Omaha, Nebraska; Princeton, N.J.; Boulder Creek CA and within the confines of Stuyvesant Town and Peter Cooper Village in New York City. In the United Kingdom, a colony of black squirrels has existed around the towns of Letchworth Garden City, Hitchin and Henlow for many years, as well as many of the villages in the area including Ickleford and Pirton. They have also been seen in the Fox Lake area in Illinois Northern Ohio, and of course, the Great Lakes in Canada and the U.S. There is a large black squirrel population in Hartford City, Indiana, as well.

The Red Squirrel populations in Britain, Ireland, and, more recently, northern Italy, have declined and become regionally extinct in recent decades, primarily because of competition from Gray Squirrels (introduced from North America), but also habitat loss. Conservation efforts include preserving and planting the conifer and ferns forests that Red Squirrels prefer. The recent colonisation of mainland Europe from Italy by Gray Squirrels is expected to result ultimately in the extirpation of the Red Squirrel over most of Europe.

Black Squirrel

White squirrels can be found in Kansas City, Kansas, Bowling Green, Kentucky, Olney, Illinois, Brevard, North Carolina, Marionville, Missouri,University City, Missouri-spring 2007, and Oberlin, Ohio. There have been sightings in Effingham, Illinois, Lemont, Illinois, Laurel, Maryland, Washington, DC, Burnsville, Minnesota and Washington.


Unlike rabbits or deer, squirrels cannot digest cellulose and must rely on foods rich in protein, carbohydrates, and fat. Early spring is the hardest time of year for squirrels, since buried nuts begin to sprout and are no longer available and new food sources have not become available yet. During these times squirrels rely heavily on the buds of trees, in particular, those of the Silver Maple. Squirrels are omnivores; they eat a wide variety of plant food, including nuts, seeds, fruits, fungi, and green vegetation, and they also eat insects, eggs, and even small birds, smaller mammals, frogs, and carrion. In tropical areas, these foods often replace nuts.

Nuisance

Squirrels are generally clever and persistent animals. In residential neighborhoods they are notorious for eating out of bird feeders, digging in potted plants either to bury or recover seeds, and for setting up house in sheltered areas including attics. While many companies sell bird feeders which are supposedly “squirrel-proof”, very few of them really are.

Squirrel eating a nut

Squirrels are sometimes also pests because they chew on various edible and inedible objects; the habit helps keep the squirrel's teeth sharp and also wears them down (rodents' teeth grow continuously). Homeowners in areas with a heavy squirrel population must keep attics and basements carefully sealed to prevent property damage caused by nesting squirrels. (A squirrel nest is known as a "drey", especially in Britain.) Some homeowners resort to more interesting ways of dealing with this problem, such as collecting and planting fur from pets (such as domestic cats and dogs) in attics. This fur will indicate to nesting squirrels that a potential predator roams and will encourage evacuation. Fake owls and scarecrows are generally ignored by the animals, and the best way to prevent chewing on an object is to coat it with something to make it undesirable: for instance a soft cloth or chili pepper paste or powder. Squirrel trapping is also practiced to remove them from residential areas.

Squirrels can be trained to be hand-fed. Because they are able to cache surplus food, they will take as much food as is available. Squirrels living in parks and campuses in cities have learned that humans are typically a ready source of food. Hand feeding is not recommended, however, because squirrels may carry plague or other animal-borne diseases. Even if they do not carry disease, they often have a hard time telling fingertips from food, and bites are painful.

Squirrels are often the cause of electricity outages. The animals will enter transformers or capacitors looking for food. The squirrels are then electrocuted and cause a power surge that shorts equipment. Squirrels have brought down the high-tech NASDAQ stock market twice and were responsible for a spate of power outages at the University of Alabama [1]. They will often chew on tree branches to sharpen their teeth but cannot tell the difference between a tree branch and a live power line. Rubber plates are sometimes used to prevent access to these facilities.

Squirrels caused 177 power outages in Lincoln, Nebraska, in 1980, which was 24% of all outages. Estimated annual costs were $23,364 for repairs, public relations, and lost revenue. In Omaha, in 1985, squirrels caused 332 outages costing at least $47,144. After squirrel guards were installed over pole-mounted transformers in Lincoln in 1985, annual costs were reduced 78% to $5,148. [[2]]

A Squirrel Common to Greenwich, London

Urban squirrels have learned to get a great deal of food from over-generous humans. One of the more common and inexpensive foods fed to squirrels is peanuts. Recent studies however have shown that raw peanuts contain a trypsin inhibitor that prevents the absorption of protein in the intestine. Dr. James K. Kieswetter of Eastern Washington University suggests using roasted peanuts instead.[3] However, wildlife rehabilitators in the field have noted that neither raw and roasted peanuts or sunflower seeds are good for squirrels, since they are deficient in several nutrients needed. This type of deficiency has been found to cause Metabolic Bone Disease, a somewhat common ailment found in malnourished squirrels.[4] [5]

Hunting and food

Until recent times, squirrel meat was considered a favored meat in certain regions of the United States where it can be listed as wild game. This is evidenced by extensive recipes for its preparation found in cookbooks including The Joy of Cooking. Squirrel meat can be exchanged for rabbit or chicken in recipes although squirrel meat is more tender than the latter. Its light red or pink flesh has only a slight game taste. In many areas of the U.S., particularly areas of the American South, squirrels are hunted for food. [1]

A recent finding of lead in a New Jersey landfill has prompted government officials to warn those who do consume squirrel meat to exercise caution. [[6]]

Squirrel Nutkin, a European red squirrel, by Beatrix Potter

Despite periodic complaints about the animal as a pest, general public opinion towards the animal is favorable, thanks to its agreeable appearance and movement and its habit of gathering and storing nuts. Squirrels are arguably the most successful wild urban animal species, as unlike rats or other rodents, squirrels are generally liked. Squirrels are popular characters in cartoons and children's books, such as the works of Beatrix Potter and Rocky, Bullwinkle's partner in adventures.

Albino squirrels are thought by some to be a source of good luck. The Albino Squirrel Preservation Society was founded at the University of Texas at Austin in 2001. Olney, Illinois, is home of the world's largest known albino-squirrel colony. Kenton, Tennessee, is home to about 200 albino squirrels. Brevard, North Carolina, also has a substantial population of white (not albino) squirrels. Western Kentucky University has a locally famous population of white squirrels. Exeter, Ontario in Canada is known for having non-albino white squirrels, believed to be the result of a genetic mutation in the early 20th century.

Albino squirrel
Non-albino white squirrel

The word squirrelled, meaning to have hidden items away, is arguably the longest one-syllable word in the English language, with eleven letters. However, this is true only in certain dialects of American English; in many American English and all British English accents, it has two syllables.

Squirrels are often referred to as "tree rats", "rats with bushy tails", or "harveys" by people who dislike them and consider them pests. The word "Squirrel" is sometimes used to describe someone who is a 'goof' or 'clown' (that is, he is a squirrel or is squirrelly). The word "squirrelly" also means "unpredictable", "shaky", or "a bit hard to control", when used in conjunction with the controls or handling of machinery.

Human interaction

  • Although known as a wild animal, there are also examples of tamed squirrels.
  • Squirrels are even known to come into close proximity of humans in places like apartment buildings, parks, and college campuses.
  • Grey squirrels make sharp squealing sounds for their calls.
  • Squirrels can spread some human diseases, such as streptobacillosis and (in Africa) monkeypox. They can also contract rabies, but are not known to be a human rabies hazard.
  • Squirrels in urban areas sometimes reject their normal diet after weaning onto "human food". (Pizza, chocolate, etc.)[citation needed]
  • Scientists were also recently baffled to discover that squirrels in an urban park had become addicted to nicotine after chewing many cigarette butts.[citation needed]

See also

References

  1. ^ Davidson, Alan (1999). "Squirrel". Oxford Companion to Food. Oxford University Press. p. 750. ISBN 0-19-211579-0.

Template:Pet Species