Here are some examples of mast:
* Acorns (from oak trees)
* Chestnuts (from chestnut trees)
* Beeches (from beech trees)
* Hickory nuts (from hickory trees)
* Walnuts (from walnut trees)
* Berries (from various shrubs)
Animals like squirrels, deer, birds, and bears gather mast for food to prepare for the coming winter. It's a vital part of their diet and helps them store energy and fat reserves for the colder months.