Raccoons

Raccoons

Identification

The raccoon (Procyon lotor), also called “coon,” is a stocky mammal about 2 to 3 feet (61 to 91 cm) long, weighing 10 to 30 pounds (4.5 to 13.5 kg) (rarely 40 to 50 pounds [18 to 22.5 kg]). It is distinctively marked, with a prominent black “mask” over the eyes and a heavily furred, ringed tail. The animal is a grizzled salt-and-pepper gray and black above, although some individuals are strongly washed with yellow. Raccoons from the prairie areas of the western Great Plains are paler in color than those from eastern portions of the region.

General Biology, Reproduction, and Behavior

Raccoons are omnivorous, eating both plant and animal foods. Plant foods include all types of fruits, berries, nuts, acorns, corn, and other types of grain. Animal foods are crayfish, clams, fish, frogs, snails, insects, turtles and their eggs, mice, rabbits, muskrats, and the eggs and young of ground-nesting birds and waterfowl. Contrary to popular myth, raccoons do not always wash their food before eating, al-though they frequently play with their food in water.

Raccoons breed mainly in February or March, but mating may occur from December through June, depending on latitude. The gestation period is about 63 days. Most litters are born in April or May but some late-breeding females may not give birth until June, July, or August. Only 1 litter of young is raised per year. Average litter size is 3 to 5.

The young first open their eyes at about 3 weeks of age. Young raccoons are weaned sometime between 2 and 4 months of age. Raccoons are nocturnal. Adult males occupy areas of about 3 to 20 square miles (8 to 52 km 2 ), compared to about 1 to 6 square miles (3 to 16 km 2 ) for females. Adult males tend to be territorial and their ranges overlap very little.

Raccoons do not truly hibernate, but they do “hole up” in dens and become inactive during severe winter weather. In the southern United States they may be inactive for only a day or two at a time, whereas in the north this period of inactivity may extend for weeks or months. In northern areas, raccoons may lose up to half their fall body weight during winter as they utilize stored body fat. Raccoon populations consist of a high proportion of young animals, with one-half to three-fourths of fall populations normally composed of animals less than 1 year in age. Raccoons may live as long as 12 years in the wild, but such animals are extremely rare. Usually less than half of the females will breed the year after their birth, whereas most adult females normally breed every year.

Family groups of raccoons usually remain together for the first year and the young will often den for the winter with the adult female. The family gradually separates during the following spring and the young become independent.

Link Information:

http://www.cdc.gov/ncidod/EID/vol9no12/03-0039.htm

http://www.cdc.gov/ncidod/dpd/parasites/baylisascaris/default.htm

Raccoon Roundworm

Baylisascaris procyonis completes its life cycle in raccoons (Procyon lotor), with humans acquiring the infection as accidental hosts. Following ingestion by many different hosts (over 50 species of birds and mammals, especially rodents, have been identified as intermediate hosts) eggs hatch and larvae penetrate the gut wall and migrate into various tissues, where they encyst. The life cycle is completed when raccoons eat these hosts. The larvae develop into egg-laying adult worms in the small intestine and eggs are eliminated in raccoon feces. People become accidentally infected when they ingest infective eggs from the environment; typically this occurs in young children playing in the dirt. After ingestion, the eggs hatch and larvae penetrate the gut wall and migrate to a wide variety of tissues (liver, heart, lungs, brain, eyes), and cause visceral (VLM) and ocular (OLM) larva migrans syndromes, similar to toxocariasis. In contrast to Toxocara larvae, Baylisascaris larvae continue to grow during their time in the human host. Tissue damage and the signs and symptoms of baylisascariasis are often severe because of the size of Baylisascaris larvae, their tendency to wander widely, and the fact that they do not readily die. Tissue damage and the signs and symptoms of baylisascariasis are often severe.

View images of damage caused by a Raccoon.

(click Image to enlarge)