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Woodchuck (Marmota monax) |
The
woodchuck, or groundhog is a member of the Squirrel Family. The woodchuck,
which inhabits most of North America, in the South is more familiarly
known as a groundhog. Its common name, woodchuck, is an anglicized corruption
of an Indian name for this species. The origin of its other name, groundhog,
is obvious from the animal's squat appearance, waddling gait and habit
of living in the ground. Description. Among North American rodents, only beavers and porcupines are larger than the marmots. Woodchucks are stocky little animals with a flattened head. They commonly weigh 2 to 4 kg, and large ones may be heavier in the autumn. They measure 40 to 65 cm total length, including a short bushy tail about 15 cm long. Fur colour varies from place to place and between individual animals. It ranges from yellowish to dark reddish brown, with an intermediate brown colour being the most common shade. The fur is usually grizzled in appearance because of light-coloured tips on the hairs. The belly fur is commonly straw-coloured and the feet black. Woodchucks are occasionally found with melanistic or albino fur. The fur of melanistic specimens is completely black. Albinos, on the other hand, have no colour in their fur at all, and even their eyes lack pigmentation, merely showing a pinkish tinge from blood vessels near the surface. Being white, they are conspicuous, and usually fall easily to predators. Because woodchucks are burrowing mammals, their feet have sturdy claws and their legs are thick and strong. Their forefeet, the principal ones used for digging, each have four well developed claws, and the hind feet have five. They escape from enemies by diving into burrows, which may account for the fact that their top running speed does not exceed 15 km per hour.
Habitat and home. Woodchucks prefer to live along the edges where timbered areas are bordered by open land or along fence rows and heavily vegetated gullies or stream banks. Here they dig their burrows. The main entrance is often located beneath a tree stump or rock and is usually conspicuous because of a pile of freshly excavated earth and stones. Side entrances are smaller and better concealed. The tunnels lead to an enlarged chamber, 3-6 feet (.9-1.8 m) underground, which contains the nest. Habits. When not hibernating or caring for young, woodchucks spend much of their time eating and sunning. They love to stretch out on warm ground, a smooth rock or along a low branch of a convenient tree. Their tree climbing ability is limited, however, and infrequently used. In preparation for their long winter sleep, or hibernation, woodchucks grow enormously fat towards the end of the summer. They begin hibernation with the onset of freezing weather, the adults before the young ones, who probably need extra time to put on sufficient fat to see them through the winter. The first adults to hibernate disappear late in September, and all woodchucks are underground in October.
In some areas, emergence from hibernation begins as early as the first week of February, but severe cold weather may delay this. As the daily temperatures rise and plant growth increases, the chucks spend more and more time above ground. In digging, the front feet and claws are used primarily, but the teeth may be employed to move stones or cut roots. The amount of subsoil removed in the course of digging one burrow averages 716 pounds (325 kg). Digging is done so rapidly that a small burrow can be finished in one day, though upkeep is continued as long as the burrow is occupied. Foods. The woodchuck is almost a complete vegetarian, eating leaves, flowers and soft stems of various grasses, of field crops such as clover and alfalfa, and of many kinds of wild herbs. Certain garden crops like peas, beans and corn are favorites. Chucks occasionally climb trees to obtain apples and pawpaws which they relish. Reproduction. The breeding season begins in mid-February soon after the animals emerge from hibernation. Pregnancy lasts 31-33 days and the the single, annual litter is born toward the end of March. At birth, the two to nine young are naked, blind and helpless. They measure about four inches (101 mm) long. The eyes open when the young are about 4 weeks old; although the kits come to the opening of the burrow at this time, they seldom venture outside until 6 or 7 weeks old. By midsummer, the young are 20 inches (508 mm) long and weigh about four pounds (1.8 kg). About this time, they may dig temporary burrows near the nursery which they use for a short period. Later, they move some distance away and establish their own homes. Importance. Woodchucks formerly were trapped for their fur, which was used for cheap fur coats. The flesh of young and lean animals is good food.
The woodchuck's taste for truck garden and agricultural crops often places it in an unfavorable position with farmers. Sometimes chucks burrow into levees and create erosion problems.
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Canku Ota is a copyright © 2000, 2001, 2002, 2003, 2004 of Vicki Barry and Paul Barry. |
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