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The white-tailed deer's coat is a reddish-brown in the spring and summer, and turns to a grey-brown throughout the fall and winter. The white-tailed deer can be recognized by the characteristic white underside to its tail. It raises its tail when it is alarmed to warn the predator that it has been detected. [11] Female with tail in alarm posture
More developed infants will typically require a longer gestation period. Altricial mammals needs less time to gestate compare to the precocial (well-developed neonate) mammal. A typical precocial mammal has a gestation period almost four times longer than a typical altricial mammal of the same body size. [20]
Whitetail Deer. Reindeer. Classification. Species: Odocoileus virginianus Species: Rangifer tarandus Native to. The Americas. The Arctic, subarctic, tundra. Fur ...
The black wildebeest or white-tailed gnu (Connochaetes gnou) is one of the two closely related wildebeest species. It is a member of the genus Connochaetes and family Bovidae. It was first described in 1780 by Eberhard August Wilhelm von Zimmermann. The black wildebeest is typically 170–220 cm (67–87 in) in head-and-body length, and the ...
Pronghorns have a gestation period of 7–8 months, which is longer than is typical for North American ungulates. They breed in mid-September, and the doe carries her fawn until late May. The gestation period is around six weeks longer than that of the white-tailed deer. Females usually bear within a few days of each other. [20]
Black-tailed deer or blacktail deer occupy coastal regions of western North America. There are two subspecies, the Columbian black-tailed deer (Odocoileus hemionus columbianus) which ranges from the Pacific Northwest of the United States and coastal British Columbia in Canada [1] to Santa Barbara County in Southern California, [2] and a second subspecies known as the Sitka deer (O. h ...
The gestation period is about 8.5 months, and between 80 and 90% of the calves are born within a 3-week time period. Female wildebeest give birth in the middle of a herd rather than alone, and typically in the middle of the day. This allows time for the newborn to become steady on its feet before night falls and the predators become more active.
This jackrabbit has an adult length of 56 to 65 cm (22 to 26 in), including a tail measuring 6.6 to 10.2 cm (2.6 to 4.0 in), and a weight between 2.5 and 4.3 kg (5.5 and 9.5 lb). From winter to spring, weight tends to increase in females due to pregnancy, but decrease in males due to the stresses of reproductive competition.