Fauna
Mammal

Caribou

Rangifer tarandus

Also known as Reindeer, Barren-ground Caribou, Woodland Caribou

Caribou are uniquely adapted to severe Arctic environments, possessing wide, concave hooves that act as natural snowshoes in deep drifts and paddles when crossing frigid glacial rivers. Both males and females grow sweeping antlers, an uncommon trait among deer that gives cows critical leverage when defending feeding craters in frozen snow. Some barren-ground herds undertake epic annual migrations spanning thousands of kilometers, shaping subarctic ecosystems across the circumpolar north.

MigratoryArcticHerd
Caribou reference1 / 7
(c) Bering Land Bridge National Preserve, some rights reserved (CC BY) · cc-by
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VulnerableConservation statusIUCN Red List categoriesLCNTVUENCREWEXVulnerableRed List categories, explained →
Key facts
Diet & preyReindeer Lichen, Cottongrass, Dwarf Willow
Predators
  • Gray Wolf
  • Grizzly Bear
  • Wolverine
ThreatsClimate change altering freeze-thaw forage access, industrial habitat fragmentation, logging, and increased predator access along seismic corridors.
HabitatsArctic tundra, subarctic taiga, boreal conifer forests, and northern mountainous plateaus.
Life span12–15 years
Classification
  1. OrderArtiodactyla
  2. FamilyCervidae
  3. GenusRangifer
  4. SpeciesRangifer tarandus
Range & activity
Native Introduced

Native range in olive; established introduced range in rust.

Safe observation
Interaction riskHigh
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is high
Large body mass and sharp antlers present blunt-force hazards; observe herds from a respectful distance.
Why it is dangerous
Mature bulls during the autumn rut and cows guarding newborn calves can charge with tremendous force, using their weight and sharp tines to strike.
How to recognize a risky encounter
Look for wide crescent hooves, brown and white coats with pale neck ruffs, and sprawling, forward-beamed antlers on both sexes.
What to do
Never intercept a herd's line of travel; if an animal raises its head, snorts, or shifts stance toward you, back away quietly.
What to notice
Look for dense herds grazing across open tundra or sparse boreal spruce-lichen woodlands.
Support conservation
Keep domestic dogs leashed and avoid operating drones near herds, as fleeing drains vital energy reserves needed for winter survival.
Responsible observation
  • Distance: Maintain at least 100 meters of space, particularly during the autumn rut or spring calving season.
  • Field Etiquette: Use high-powered optics from road shoulders or designated viewpoints instead of pursuing herds on foot.
Related species
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