The Acorn Woodpecker stores acorns in holes and raises young with other members of its group.
It has a white face, a red crown, and black upperparts.
Acorn Woodpeckers make holes in trees and store acorns in granaries. In a central California oak savanna, researchers used genetic information from acorns collected between 2002 and 2007 to identify the trees where the acorns had grown. The distance to each granary helped reconstruct the birds' foraging movements.
In years with more acorns, most family groups collected them from nearer trees. Groups used almost non-overlapping sets of source trees, and each group returned to largely the same trees from year to year. The amount of acorn food available shaped how far the woodpeckers travelled while gathering it.
An extinction-risk assessment has not been added yet.
In the California study, Acorn Woodpecker groups foraged nearer to granaries in years with more acorns. Groups used largely separate source trees and revisited many of the same trees across years.