Bryan McAllister’s personal reference notebook
July 30, 2026Short & citedBlog
Civic Viewpoint.
A quiet encyclopedia with a personal desk
Field Notes • Mammal

Deer

Deer are hoofed ruminant mammals in the family Cervidae, an even-toed ungulate group that includes species such as white-tailed deer, moose, elk, and caribou.

Updated July 30, 20261 min readCited sources

Deer are hoofed, ruminant mammals in the family Cervidae. They are known for their antlers and are found across much of the Northern Hemisphere, including five species in Canada.

What it is

Deer belong to the order Artiodactyla (even-toed ungulates) and the family Cervidae. They are ruminants with a four-chambered stomach, and most species have antlers that are shed and regrown annually. There are about 43 to 55 living species worldwide, ranging from the small pudú to the large moose.

Key details

Antlers are a distinctive feature—typically grown by males, though females of some species (e.g., caribou) also grow them. Deer are herbivores that feed on grasses, twigs, bark, and shoots. They inhabit diverse environments: forests, tundra, deserts, swamps, and mountain slopes.

Deer in Canada

Five deer species occur in Canada: white-tailed deer, mule deer, caribou, moose, and elk. These animals are integral to Canadian wildlife, ecology, and cultural history, featuring in Indigenous traditions, settler livelihoods, and modern hunting and conservation.

In short

  • Deer belong to the family Cervidae within the order Artiodactyla.
  • Most males grow antlers that are shed and regrown annually.
  • Deer are herbivores that eat grasses, twigs, bark, and shoots.
  • Canada has five deer species: white-tailed deer, mule deer, caribou, moose, and elk.
Canadian angle

Deer are important to Canadian wildlife and ecology, and five species occur in Canada: white-tailed deer, mule deer, caribou, moose, and elk.

Quick questions

What are deer?
Deer are hoofed ruminant mammals in the family Cervidae, part of the even-toed ungulates.
Do all deer have antlers?
Most male deer grow antlers, and females of some species also do. One exception is the Chinese water deer.
Which deer species are found in Canada?
Canada has white-tailed deer, mule deer, caribou, moose, and elk.

Sources

  1. Britannicahttps://www.britannica.com/animal/deer
    Supports: Deer are Cervidae in Artiodactyla; species count; antlers; distribution
  2. Encyclopedia.comhttps://www.encyclopedia.com/plants-and-animals/animals/vertebrate-zoology/deer
    Supports: Deer classification, family Cervidae, subfamilies
  3. The Canadian Encyclopediahttps://www.thecanadianencyclopedia.ca/en/article/deer
    Supports: Five deer species present in Canada
  4. PBS Naturehttps://www.pbs.org/wnet/nature/group/mammals/deer-mammals/
    Supports: Antler shedding, deer family traits, examples of species
  5. Britannica Kidshttps://kids.britannica.com/kids/article/deer/353044
    Supports: Diet, habitats, size range, antlers, general characteristics