Acorn Woodpecker (image) University of Chicago Press Journals Caption Above: an acorn woodpecker on its granary. Stored acorns are a critical food resource for this species. Below: an adult male acorn woodpecker. This species lives in family groups including helpers, who are young from prior nests. Credit Walter Koenig © Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.