Chaucer spoke of "achornes of okes" in the 14th century.
Wildlife that consume acorns as an important part of their diets include birds, such as jays, pigeons, some ducks, and several species of woodpeckers. Small mammals that feed on acorns include mice, squirrels and several other rodents. Acorns have a large influence on small rodents in their habitats, as large acorn yields help rodent populations to grow.
By Amphis - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=20049624