8/18/2023 0 Comments Acorn woodpecker e.g![]() The Acorn Woodpecker is considered a pioneering species. These helpers may even breed, or attempt to breed, in the same nest as their parents-but this is another story! Also, males generally outnumber female fledglings each year, possibly explaining the dynamics of this highly social behavior. Sometimes male, and to a lesser extent female, offspring from prior years may remain on the natal territory for up to 10 years, where they help to raise subsequent broods. 7.8% per year since 1980 for the 14 routes in the state where the species is reported.Īcorn Woodpeckers live in family groups, which at a minimum are comprised of a breeding male and female. Most Acorn Woodpeckers will remain on their home territories through the winter, as long as they have a reliable food supply.īreeding Bird Survey data for Oregon (with the highest degree of credibility for the survey) show an increasing trend in the state since the mid-70s, with an increase of approx. In addition to acorns they also need granary, or storage, trees (although one small population in the Southwest has plenty of acorns but no storage trees, and they have adapted to this by migrating). ![]() Their wing and body morphology are specially adapted for catching flying insects.Īcorn Woodpeckers are generally non-migratory, and they are only resident in regions with a reliable acorn source. Their bill and tongue morphology indicate that they are generalists, although the bill shape may also make it easier to carry acorns. In all seasons, they prefer insects, whenever they are available. They will also eat insects/arthropods any time of year, with insects becoming their primary food during the breeding season. From winter through summer, they supplement their forage with sap (usually from wells they make themselves). In general, Acorn Woodpeckers eat acorns from about August through May, but more so in the fall, as the crop ripens. This female Acorn Woodpecker was photographed in Pima County, Arizona on 25 April 2009.
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