Male Western moose are aggressive during mating season (autumn and winter) and may injure or kill with provocation.

[5] Western moose eat terrestrial vegetation such as forbs and shoots from willow and birch trees and aquatic plants, including lilies and pondweed.

The Western moose, like other species, lacks upper front teeth but instead has eight sharp incisors on its lower jaw.

In the event of a fight over mating rights, bull moose risk locking their antlers, which almost always results in them both dying from starvation.

A female may attack if she feels that her calves are threatened, although, at around 10–11 months yearling Western moose are chased off by their mothers to fend for themselves.