Provincial Mammal
White-tailed Deer
Odocoileus virginianus
Description Size varies greatly; a small to medium-size deer. Tan or reddish brown above in summer; grayish brown in winter. Belly, throat, nose band, eye ring, and inside of ears are white. Tail brown, edged with white above, often with dark stripe down center; white below. Black spots on sides of chin. Bucks antlers have main beam forward, several unbranched tines behind, and a small brow tine; antler spread to 3' (90 cm). Doe rarely has antlers. Fawn spotted. Ht 2745" (68114 cm); L 6' 2"7' (1.882.13 m); T 613" (1533 cm); HF 1920" (47.551.2 cm); Wt male 150310 lb (68141 kg), female 90211 lb (4196 kg).
Endangered Status Two subspecies of the White-tailed Deer are on the U.S. Endangered Species List. The Key Deer is classified as endangered in Florida, and the Columbian White-tailed Deer is classified as endangered in Washington and Oregon. The Key Deer declined in number as more and more of its habitat in the Florida Keys underwent development throughout the 20th century. Development continues to be a threat to the subspecies today. In 1961 the National Key Deer Refuge was established to protect the deer. The population has risen from a possible low of 25 animals in 1955 to about 250 to 300 today. The Columbian White-tailed Deer once ranged from Puget Sound to southern Oregon, where it lived in floodplain and riverside habitat. The conversion of much of its homeland to agriculture and unrestricted hunting reduced its numbers to a just a few hundred in the early 20th century. It now lives in a few scattered populations, and its numbers have climbed to over 6,000. Julia Butler Hansen Refuge for the Columbian Whitetail Deer provides critical habitat for these deer in southern Washington.
Similar Species Mule Deer has antlers with both main beams branching; tail tipped with black.
Breeding Reproductive season varies: first 2 weeks in November in north, January or February in south. 13 young born after gestation of about 6 1/2 months.
Habitat Farmlands, brushy areas, woods, and suburbs and gardens.
Range Southern half of southern tier of Canadian provinces; most of U.S., except far Southwest.
Discussion Although primarily nocturnal, the White-tailed Deer may be active at any time. It often moves to feeding areas along established trails, then spreads out to feed. The animal usually beds down near dawn, seeking concealing cover. This species is a good swimmer. The winter coat of the northern deer has hollow hair shafts, which fill with air, making the coat so buoyant that it would be difficult for the animal to sink should it become exhausted while swimming. The White-tailed Deer is also a graceful runner, with top speeds to 36 mph (58 km/h), although it flees to nearby cover rather than run great distances. This deer can make vertical leaps of 8 1/2 feet (2.6 m) and horizontal leaps of 30 feet (9 m). The White-tailed Deer grazes on green plants, including aquatic ones in the summer; eats acorns, beechnuts, and other nuts and corn in the fall; and in winter browses on woody vegetation, including the twigs and buds of viburnum, birch, maple, and many conifers. The four-part stomach allows the deer to feed on items that most other mammals cannot eat. It can obtain nutrients directly from the food, as well as nutrients synthesized by microbes in its digestive system. This deer eats 5 to 9 pounds (2.254 kg) of food per day and drinks water from rain, snow, dew, or a water source. When nervous, the White-tailed Deer snorts through its nose and stamps its hooves, a telegraphic signal that alerts other nearby deer to danger. If alarmed, the deer raises, or "flags," its tail, exhibiting a large, bright flash of white; this communicates danger to other deer and helps a fawn follow its mother in flight.There are two types of social grouping: the family group of a doe and her young, which remain together for nearly a year (and sometimes longer), and the buck group. The family group usually disbands just before the next birth, though occasionally two sets of offspring are present for short periods. Bucks are more social than does for most of the year, forming buck groups of three to five individuals; the buck group, which constantly changes and disbands shortly before the fall rut, is structured as a dominance hierarchy. Threat displays include stares, lowered ears, and head-up and head-down postures. Attacks involve kicking and, less commonly, rearing and flailing with the forefeet. Bucks and does herd separately most of the year, but in winter they may gather together, or "yard up." As many as 150 deer may herd in a yard. Yarding keeps the trails open through the movement of large groups of animals, and provides protection from predators. The leadership of the yards is matriarchal. Deer may occupy the same home range year after year, and may defend bedding sites, but otherwise are not territorial. The White-tailed Deer is less polygamous than other deer, and a few bucks mate with only one doe. The extended rutting season begins at about the time the male is losing his velvet, which varies with latitude. At this time, bucks are still in buck groups, and sparring for dominance increases. (Sparring consists of two deer trying to push each other backward.) The buck group then breaks up, and several bucks begin following a doe at a distance of 150 feet (50 m) or so. They follow the does scent; the largest buck stays closest to the female. A buck attempts to dominate other bucks and may mate with several does over the breeding season. He produces "buck rubs" and also "scrapes," revisiting them regularly during the rut; glandular secretions are left on the rubs. Does visit the scrapes and urinate in them; bucks then follow the trails of the does. After the mating season, the doe returns to the subherd until spring (May or June in the North; January to March in the deep South). A young doe bred for the first time usually produces one fawn, but thereafter has twins and occasionally triplets if food is abundant. The female remains near the fawns, returning to feed them only once or twice a day. Twin fawns are separated, which serves to protect them. Weaning occurs between one and two and a half months. Fawns stay with the mother into the fall or winter, sometimes for up to two years, but the doe generally drives off her young of the previous year shortly before giving birth. The Whitetails first antlers are usually a single spike (the "spikehorn"). A three-year-old would be expected to have eight points, but there can be more or less, as the number of tines is influenced greatly by nutritional factors. A Whitetails age is determined not by the number of tines on its horns but by the wear on its teeth.
Once nearly exterminated in much of the Northeast and Midwest, this deer is now more abundant than ever, owing to hunting restrictions and the decline in number of its predators, wolves and the Mountain Lion. It has become the most plentiful game animal in eastern North America and is even something of a pest in many areas, eating garden plants and contributing to the spread of Lyme disease. Thinning the deer population is best done by hunting both does and bucks, as hunting bucks only alters the herd rather than reducing it.
There are two dwarf subspecies of White-tailed Deer: the Coues Deer, or Arizona Whitetail (O. v. couesi), of the Arizona desert, and the Key Deer
(O. v. clavium) of the Big Pine Key area in the Florida Keys. The Coues Deer, which has somewhat enlarged ears and tail relative to the other Whitetails, reaches a maximum of about 100 pounds (45 kg). The tiny, dog-size Key Deer weighs 45-75 pounds (21-34 kg) or less. Some mammalogists classify the Key Deer as a separate species.
Too bad it's disappearing...
