Deer are plant-eaters, or herbivores. The males grow antlers which they use to display to females in the breeding season as well as to fight other males. After the deer have mated the males lose their antlers and only grow new ones just before the next breeding season. The females may have one or two young. When they are new born they are hidden away in a clump of bushes, but as they get older the mother takes them with her as she feeds.

Deer eat grass (called grazing) and also leaves from bushes and trees (called browsing). In winter they may have to push snow out of the way with their noses. If the snow is too deep, they eat bark from trees. Many deer move away from the coldest and snowiest areas over winter (they migrate).

Deer are not at the top of the food chain, so they have to watch for hunters such as wolves.

The food chain involving deer is wolf>>deer>>grass/leaves/bark.

They are threatened by: too little grazing and browsing wilderness area.