The key piece of information is the antlers. Unlike other deer species, both male and female reindeer grow antlers. However, males shed theirs after the mating season, in early December.

they’re called caribou in their wild habitat and reindeer when domesticated. Antlers are their largest and most prominent feature. These are big branching bones that grow from the top of the head.

But viral posts claim all of Santa’s reindeer are actually female because male reindeer lose their antlers in the winter. Some people online also claim real reindeer can have red noses like ...