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RACCOONS

Raton

Description

The common raccoon Procyon lotor is probably best known for its mischievous-looking black face mask. Raccoons are usually a grizzled grey in colour with a tail marked by five to 10 alternating black and brown rings. Body coloration can vary from albino, (white) to melanistic (black) or brown. An annual moult, or shedding, of the fur begins in the spring and lasts about three months.
 
The head is broad with a pointed snout and short rounded ears measuring 4 to 6 cm. The eyes are black. Total body and tail length for adults’ averages 80 cm; males are generally 25 percent larger than females. Raccoons in northern latitudes tend to be heavier (6 to 8 kg) than their southern counterparts (4 kg). However, fall weights for adults have reached 28 kg in some areas.

Habitat and habits 

Raccoons are able to live in a wide range of habitats. The only apparent requirements are a source of water, food, and a protected area for denning. The best habitats are hardwood swamps, floodplain forests, fresh- and saltwater marshes, and farmland, both cultivated and abandoned. On the prairies, raccoons are most abundant in woodlot and wetland areas. This highly adaptable animal is also very common in many cities of North America.

Movements and home ranges of raccoons vary greatly depending on habitat, population density, and food supply. The home range is the area used by an animal for food, water, and shelter in its normal, day-to-day movements. In rural agricultural areas of eastern North America, home ranges between 1 and 4 km2 are common, whereas in prairie habitat, raccoons have used areas as large as 50 km2. At the other extreme, the area used by urban raccoons has been documented at less than 0.1 km2. Generally, home ranges of individual raccoons overlap, and there is little evidence of territoriality, especially in urban areas.

As with home ranges, raccoon densities vary significantly depending on the type of habitat. Estimates of five to 10 raccoons per square kilometre are common in rural agricultural areas. In urban areas, exceptional numbers of raccoons, as high as 100 per square kilometre, have been recorded. However, densities as low as one per square kilometre may occur in prairie habitat.

In the northern United States and southern Canada, the annual life cycle of raccoons consists of a breeding period during late winter and early spring, a growth and fattening period during the summer and fall, and a winter denning period. In more southern latitudes, winter denning occurs only during periods of poor weather.

Winter denning allows the raccoon to conserve energy in the form of fat reserves when food is not available. This is not hibernation, but a period of inactivity. The body temperature does not drop, and the animal’s activity appears to be governed by the air temperature. Preferred denning sites include hollow trees, stumps, logs, caves, vacant groundhog or fox burrows, and buildings such as barns. In city areas, denning sites include residential chimneys, sewers, garages, attics, trees, and culverts. Adult males usually den alone, but the family unit often dens together during the first winter. Communal dens containing as many as 23 raccoons have been reported; however, four to five is more common. Although usually one den is used during the winter, several different dens provide sanctuary during other seasons.

Unique characteristics

The name raccoon is derived from the Algonquian Indian word arakun, meaning "he scratches with his hand." The species name, lotor, refers to the raccoon’s supposed habit of washing food with its front paws. This activity, however, is probably associated with the location and capture of aquatic prey such as crayfish. The behaviour is no doubt innate, because captive raccoons have been observed attempting to "wash" their food in the absence of water.

Because the raccoon can be easily tamed when young, many people have had their lives enriched by a close association with this intelligent, inquisitive animal. Males, however, may become aggressive as they mature and usually end up being returned to the wild. The raccoon is one of the few creatures that appears capable of making the adjustment from family pet back to wild animal.

Feeding 

Raccoons are omnivorous and will consume practically any food item, plant or animal. They prefer corn, crayfish, fruits, and nuts, but there is a seasonal shift in diet depending on availability of food items. During the spring, animal matter, including invertebrates, or small animals without backbones, and insects, makes up the major portion of the diet. While they prefer crayfish, raccoons also consume muskrats, squirrels, rabbits, waterfowl eggs, and freshwater clams. In the summer, plant material, including fruits and nuts, becomes more important. Wild cherries, gooseberries, elderberries, wild grapes, strawberries, and garden items such as potatoes and sweet corn are relished. They also eat frogs, small fish, turtles, beetle grubs, grasshoppers, earthworms, crickets, and snails during the summer.

Corn is the mainstay of the fall diet in most areas where it is available; however, acorns, beechnuts, hazelnuts, and grapes are also consumed. Raccoons raid the nests of insects, including hornets, bumblebees, termites, and ants, mainly for the larvae, or immature stage. The raccoon’s thick fall and winter coat protects it from the stings of irate adult hornets or bees.

The fall diet is extremely important for raccoons in northern latitudes because they must accumulate sufficient fat reserves to sustain them during winter denning. The raccoon builds up fat over its entire body, even around the tail bone. It may be 2.5 cm thick on the back. In fact, by late fall about half of the animal’s total body weight may be fat. In northern areas the raccoon lives on its stored body fat during the winter, but farther south where nuts and corn are plentiful it continues to hunt for food year-round. In suburban areas, raccoons often raid garbage bins or hunt for earthworms, beetles, and grubs on residential lawns. Raccoons can also be a menace to farmers because they may eat domestic fowl and eggs.

Breeding 

The breeding season generally begins in late January or early February in the northern parts of the raccoon’s range. Mating tends to take place in March in most areas. Birth of offspring peaks during May, although births have been recorded as early as March or as late as September. Year-round breeding has been reported for raccoons in southern areas.

Male raccoons are polygamous, or will mate with several females in succession. Females, however, are monogamous, and will mate with only one male and will not tolerate other males after mating has occurred. Juvenile females often breed during their first year. Juvenile males, although capable, usually do not have the opportunity to mate until their second year because of competition from adult male raccoons. Litter sizes tend to be larger in the northern part of the range. Between three and seven young per litter are common in northern latitudes; however, litters of two or three young are usually the rule in southern areas. The gestation, or pregnancy, period averages 63 days.

Raccoons are born without teeth and with eyes closed, and they weigh approximately 75 g. The eyes open at two weeks of age, and the teeth erupt at about 19 days. By about 10 days of age the young are already sporting the familiar facial mask and colour patterns typical of the species. The young remain in the maternity den for about eight weeks and then leave to hunt for food with the female, although they still nurse from time to time for almost two months. The adult male plays no role in raising the young.

The family group, which consists of the adult female and young, is quite sociable, hunting for food together during the night and denning together during the day. The mother teaches her young to climb, hunt, and swim during their first summer. The family unit generally remains together until the adult female has her next litter, usually the following spring. Juvenile males often disperse from the adult female’s home range, although juvenile females may remain within the vicinity of the mother’s range.

The life span of raccoons in the wild is estimated at three to five years; most populations are completely replaced over seven years. However, longevity records of 12 and 16 years have been noted in captivity and in the wild, respectively.

In urban areas considerable damage to residential roofs, garages, gardens, and lawns has been blamed on raccoons. Often the only solution is to remove the offending animals by trapping or hunting.

Control Method

If a raccoon has invaded your attic, we suggest that you consult a pest control professional. 

 


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