1. A small dabbling duck (Anas crecca) with a green head and neck in males, found in the Northern Hemisphere.
Usage: Also called Eurasian teal; Ornithology
2. A North American duck (Anas carolinensis) similar to the Eurasian species, with a green patch on the wing.
Usage: Also called American green-winged teal; Ornithology

Examples

• The greenwing is one of the smallest dabbling ducks in North America.
• Birdwatchers spotted a male greenwing with its distinctive green head at the wetland.
• Greenwings migrate south in winter to find open water.
• The greenwing's rapid flight makes it a challenging target for hunters.
• During breeding season, male greenwings display their vibrant plumage to attract females.