A caribou in a field of grass with very large antlers

Unique among deer, both sexes grow antlers! Males shed them after rut, while pregnant females keep theirs through winter. Antlers grow fast—up to 2.5 cm/day—and are used in foraging and dominance. #CaribouAntlers #WildlifeBiology #WorldCaribouDay #Zoology photo: Michael Miller/Univ Cincinnati