Black Bears are the smallest and most widely distributed of the three bear species native to North America. They are highly efficient hibernators, spending three to five months in self-excavated dens. During this time, their bodily functions diminish 40-50%, heart rates dropping from 40-50 beats per minute to just 8 beats per minute. Born in January, cubs stay with their mothers for up to two years, learning to hunt and forage. 1.25″ Hard enamel pin; nickel metal.