The Alaska-Yukon moose (Alces alces gigas) is the largest of all moose. Adult moose can range in size from 800 pounds (small adult female) to 600 pounds (large adult male), and they can be up to almost 6 feet tall. Moose can range in color from golden brown to almost black, depending on the season and the age of the animal. Newborn calves have a red-brown coat that fades to a light rust color within a few weeks. By late summer, the calves have shed this coat and grown one that is similar in texture and color to that of adults.
Moose are often easily recognized by their antlers, carried only by the males. These bony protrusions form within the first year, and are produced every summer after that. Trophy class bulls are found throughout Alaska, but the largest come from the western portion of the state. The largest sized antlers are usually produced when bulls are 10 – 12 years old, but bulls can reach trophy size as young as 6 years of age.