Green-winged Teal by the Millions

Green-winged Teal are North America's smallest dabbling duck, at just over a foot long and weighing less than a pound. The male has a cinnamon brown head with a band of green behind the eye. Both males and females have a green bar on the wing that gleams like an emerald when the sun strikes it. During courtship, up to 25 males may court a single female at once.

More info and transcript at BirdNote.org. 

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