Bull moose antlers, which are grown and cast off each year, are a dramatic characteristic of this
species. Two types of antlers are found in yearling bulls. The cervicorn type varies from a single
spike to a small fork, with or without additional points. The palmicorn type have small palms with
several points or protuberances. At two years of age nearly all bulls in the Yukon have small, but well developed palms on their antlers. The size of the palms, antler spread and number of tines increase each year until the bulls reach their prime at about six years of age. After the prime years, antlers may become slightly
smaller and begin to deform.