Green-winged Teal

Anas carolinensis

The color teal is named after these ducks, for the blue-green stripe on the head of the Eurasian teal, not the other way around. The word itself goes back to the Middle English tele, and 'green-winged' is for the shiny patch on its wing.

Anas is Latin for 'duck'; carolinensis means 'of Carolina.' 'Teal' comes from the Middle English tele, with related words in Dutch and German.