Acorns are the nuts produced by oak trees, serving as a vital food source for various wildlife, including squirrels, deer, and birds. They are typically round or oval in shape and have a hard outer shell, with a cap that covers part of the nut. Acorns come in different sizes and colors, depending on the species of oak tree. These nuts play a crucial role in forest ecosystems, as they help in the regeneration of oak trees. When animals consume acorns, they often bury some for later, which can lead to new oak saplings growing in different locations, promoting biodiversity and forest health.