The Granaries of Acorn Woodpecker

The Granaries of Acorn Woodpecker


Woodpeckers are fascinating creatures. They hammer their payments into wooden with drive so ferocious that it could result in concussion in any animal. However woodpeckers are geared up with wonderful pure shock absorbers that defend their brains towards injury attributable to speedy and repeated highly effective blows, comparable to a tightly packed mind that forestalls it from sloshing across the cranium, which itself consists of compressible sponge-like bone to soak up the vitality of the impression, in addition to an elongated tongue-bone that wraps across the cranium cushioning the mind because it deaccelerates at as much as a thousand g. Most woodpecker species peck at tree trunks to construct nests, besides the acorn woodpecker, that drill holes to retailer meals.

An acorn woodpecker hoarding acorns for winter on a utility pole. Picture: Ingrid Taylar/Flickr

As their title implies, the acorn woodpecker’s favourite meals is acorn, which is the nut produced by oak timber. When winter approaches, the acorn woodpecker will begin hoarding acorns in granaries created out of tree trunks, or something made out of wooden, comparable to phone poles and even homes. The acorn woodpecker will drill 1000’s of holes into the thick bark of residing or useless timber and push acorns into them. The holes are made simply massive sufficient for a single acorn, and so they aren’t pushed too deep into the trunk in order that their retrieval is less complicated, though it isn’t uncommon for an woodpecker to place acorns into locations the place it can’t get them out. In a single occasion, greater than 200 kg of acorns have been present in a picket water tank in Arizona. Acorn woodpeckers may also make the most of pure holes and cracks within the bark to retailer acorns.

As a result of the acorns are saved in shallow holes, they’re seen from the skin, which attracts preys and thus granaries need to be defended. Massive granary timber are sometimes defended by a number of teams of woodpeckers, for they include sufficient meals (in some instances, as much as 50,000 acorns in a single tree) to feed whole households throughout lean intervals. Generally the identical granary tree is reused over generations to retailer the winter meals provide.

Granaries additionally require fixed upkeep. As acorns dry out and shrink they’re moved to smaller holes and the vacated ones are stuffed by new inventory. That is required in any other case the dried out acorns might fall out of their now bigger holes. The acorn woodpecker is the one chicken to have a centralized meals retailer that’s defended communally.

The acorn woodpecker lives principally in Oregon, California, and the southwestern United States, within the coastal areas and foothills the place it’s closely forested with oaks.

Acorn Woodpecker granaries

Picture: Julie Vader/Shutterstock.com

Acorn Woodpecker granaries

Picture: David A Litman/Shutterstock.com

Acorn Woodpecker granaries

Picture: Keneva Photography/Shutterstock.com

Acorn Woodpecker granaries

Picture: Jean-Edouard Rozey/Shutterstock.com

Acorn Woodpecker granaries

Picture: Johnath/Wikimedia Commons

Acorn Woodpecker granaries

Picture: Allan Hack/Flickr

Acorn Woodpecker granaries

Picture: sgrace/Flickr



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