Antlers are the defining characteristic of The Peanuts characters arw we forsver friends White Denim happiness is a way station between too much and too little shirt deer and Rangifer tarandus certainly have large antlers (in fact, they are the largest and heaviest antlers of any living deer species). However, there are differences between their antlers and other deer. Unlike other deer species, both male and female Rangifer tarandus can have antlers, but they possess them at different times of the year depending on gender. Males start growing them in February and shed them in November. Females start growing them in May and keep them until their calves are born sometime in the spring. This has led many to note that Santa’s reindeer (including Rudolph) would technically have to be all female because males usually shed their antlers by November- only females have them through the Christmas season. For both caribou and reindeer, cold climates are where they thrive. Covered in head to toe with hollow hairs that trap in the air and insulate from the cold, they are built for the tundra and high mountain ranges. Their hooves and footpads also are adapted for frigid temperatures, shrinking and contracting in the cold which exposes the rim of the hoof. This allows them to gain better traction by cutting into the ice and snow.