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The red-tailed chipmunk is a large species with a total length of about 230 mm (9 in) including a bushy tail of 105 mm (4 in). The mass varies from about 54 g (1.9 oz) in the spring to 60 g (2.1 oz) in the fall. Females are marginally larger than males. The head is mottled grayish-brown with dark stripes above, through and below the eye.
The Lodgepole chipmunk is an omnivore, feeding on both animal (mammals, birds, bird eggs, small invertebrates arthropods, and insects) and plant matter (leaves, flowers, pollen, fungi, and seeds). [3] Like most rodents, this chipmunk engages in the foraging behavior of caching and storing food in order to survive the long winter hibernation.
Gray-footed chipmunks experience sexual dimorphism, and the female is larger than the male. This is commonly seen in many species of chipmunks. [7] Because the gray-footed chipmunk physical characteristics vary in different mountain ranges, their weight is commonly between 65 and 75 g (2.3 to 2.65 oz). [11]
The yellow-pine chipmunk (Neotamias amoenus) is a species of order Rodentia in the family Sciuridae.It is found in parts of Canada and the United States. [2]These chipmunks are normally found in brush-covered areas, and in California, they inhabit an elevation range of around 975 to 2,900 meters.
The gray-collared chipmunk grows to a total length of about 225 mm (9 in) including a tail of around 98 mm (4 in). The forehead is greyish-brown and the side of the head bears three dark stripes, the central one of which passes through the eye. These are separated by bands of white. The cheeks, neck, shoulders, upper back, and rump are grey.
Its fur is grayish-brown, with dark and light-colored dorsal stripes. It has light gray or white stripes around the eyes and a white underbelly. The tail is very bushy, often measuring over 80% of the head and body length. They experience molting of the fur on their bodies and tails. [3] The dental formula for Tamias merriami is 1.0.2.3. 1.0.1.3.
Siberian chipmunks usually live solitary lives, but during the winter they create a burrow, which they often share with another chipmunk. [ 3 ] [ 9 ] Its burrow, which can be 2.5 m (8 ft 2 in) long and 1.5 m (4 ft 11 in) deep, consists of a nest chamber, several storage chambers and chambers for the waste.
Chipmunks are classified as four genera: Tamias, of which the eastern chipmunk (T. striatus) is the only living member; Eutamias, of which the Siberian chipmunk (E. sibiricus) is the only living member; Nototamias, which consists of three extinct species, and Neotamias, which includes the 23 remaining, mostly western North American, species.