How to Identify Acorn Woodpecker Feathers

What Acorn Woodpecker's Feathers Look Like

Acorn Woodpecker sports one of the boldest black-and-white patterns of any North American woodpecker. Back and wing covert feathers are solid glossy black, while the belly and lower breast show a black-and-cream streaked pattern, quite different from the clean white bellies of many other woodpeckers. The most diagnostic flight feather trait is a white patch confined to the base of the primaries, with the outer half remaining black — in flight this creates a flashing white wing patch, but a single fallen feather will show black at the tip and white only near the base, typically on a feather 10-14 cm long. Face feathers, if found, would show the species' clown-like pattern, but the black wing-base/tip split is the most reliable clue from body molt alone. Crown feathers from males are bright red; females show a black band separating red from white on the forehead.

Step-by-Step: Is This Feather From a Acorn Woodpecker?

• Check the wing feather pattern. Black tip transitioning to white only at the base is the single strongest clue — the white does not extend the full length of the feather.
• Look for streaking on belly feathers. A black-and-cream streaked (not solid white) belly feather rules out several other black-and-white woodpeckers.
• Check back feather gloss. Solid black with a slight gloss, unbroken by any white barring.
• Note red crown feathers. A vivid red feather with a black base, found alongside black-and-white feathers, supports a woodpecker crown origin.
• Measure the flight feather. 10-14 cm is consistent with a medium-sized woodpecker, larger than Downy or Hairy Woodpecker feathers.

Similar Species & How to Tell Them Apart

• Red-headed Woodpecker: Its secondaries are entirely white, not just white at the base, creating a much larger, more solid white wing panel; its belly is also clean white rather than streaked.
• Downy and Hairy Woodpeckers: Much smaller feathers overall, with a white stripe down the back rather than a solid black back, and no white patch confined to the primary base.
• Lewis's Woodpecker: Has an iridescent greenish-black body and a pinkish belly wash, entirely lacking the bold white wing-base patch and streaked underparts of Acorn Woodpecker.

Where & When You'll Find Them

Acorn Woodpeckers live year-round in oak woodlands of the western United States, Mexico, and Central America, where they famously store acorns in "granary" trees. Because they are non-migratory and highly social, feathers are often found in clusters near communal granary trees and nest cavities. Molt is concentrated in the post-breeding period, roughly late summer into early fall, after the demands of raising young and defending granaries have eased.