Acorn Woodpecker

Melanerpes formicivorus

The acorn woodpecker is a medium-sized woodpecker with a length of around 20 cm, and an average weight of 85 g. It is found across Central America, as well as North into the western United States and South into parts of Colombia.

Acorn woodpecker holding a nut in its beak on the campus of California State University, Chico. Photo shared on Wikipedia by Frank Schulenburg.
Acorn woodpecker holding a nut in its beak on the campus of California State University, Chico. Photo shared on Wikipedia by Frank Schulenburg.
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Community Sightings

Recent observations from the iNaturalist community

Acorn Woodpecker observed by wildharttmom
Apr 18, 2026
Landmark Cir, Redding, CA, US
bywildharttmom
Research Grade
· 1 ID
Acorn Woodpecker observed by seattleslayyyer
Apr 18, 2026
Thorntree Dr, San Jose, CA, US
bySeattle Slayyyer
Research Grade
· 1 ID
Acorn Woodpecker observed by malachiteiris
Apr 18, 2026
Livermore, CA 94550, USA
bymalachiteiris
Research Grade
· 1 ID
Acorn Woodpecker observed by mushroomketchup
Apr 17, 2026
Alum Rock Park, Santa Clara County, US-CA, US
byMushroomKetchup
Research Grade
· 1 ID
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