Separating the Wheat From the Chaff

Chipping sparrow with seed in beak (photo from Wikimedia Commons)

28 April 2022

Seed-eating birds use only their beaks to extract their food from shells and husks. Have you noticed how they do it?

At the feeder you may see them pick up a whole nut, crack the shell with their strong beaks and let the shell fall, then work on the seed inside their mouths with tongue and beak. They do the same with grassy seeds though we rarely see it.

Evening grosbeak and American goldfinch at the feeder, Nov 2012 (photo by Marcy Cunkelman)

This slow motion video of a field sparrow (Spizella pusilla) shows how he separates the “wheat” from the chaff. It’s a lot of mouth work for tiny seeds.

(photos from Wikimedia Commons and Marcy Cunkelman)

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