• At one week old, a caribou calf is already able not only to run, but also to swim across a wide river.
• The maximum lifespan of domestic caribou reaches 28 years, while that of wild caribou is shorter.

Caribou typically live for 12 to 18 years, with a maximum recorded lifespan of 21 years and 10 months, and a theoretical lifespan ranging from 10 years and 11 months to 21 years and 10 months. The species reaches sexual maturity between 1 year and 6 months and 4 years of age; the young are born with their eyes open and begin walking immediately. During the embryonic stage, the developing fetus receives nourishment from the mother and does not eat independently. The calf stage, also known as a calf, lasts from 1 day to 6 months, during which the young drinks its mother's milk and learns to find food. Following this, the species enters the adult stage, lasting from 2 to 20 years, during which it can reproduce and lives independently.