What are 2 mammals that shed their antlers at certain times of the year?

Two mammals that shed their antlers at certain times of the year are:

1. Elk: Elk, also known as wapiti, are members of the deer family. Their antlers are shed annually, typically between late fall and early spring.

2. Moose: Another member of the deer family, moose also shed their antlers yearly, usually in late fall or early winter.

These animals shed their antlers as part of a natural cycle, allowing for new, larger antlers to grow in the following year.