EDITOR: Identified as a Eurasian, which do show up in North America. After researching, I suspect a typo by photographer. I had written: Maybe a vagrant from Eurasia. Here is some information about differentiating the Eurasian and Green-winged Teals and hybrids.
A small dabbling duck similar to the [Eurasian Teal] which is generally found in Eurasia. [Eurasian Teal]s are rare but regular in the Americas. Only males in breeding plumage can be differentiated: look for a vertical white stripe near the front when the duck is resting on the water (see photo).
Africa (entire continent rather than south of Sahara)
AN
Antarctica
AO
Atlantic Ocean
AU
Australasia (Wallacea (Indonesian islands east of Wallace's line), New Guinea and its islands, Australia, New Zealand and its subantarctic islands, the Solomons, New Caledonia, and Vanuatu)
PAL
Eurasia (Europe, Asia from the Middle East through central Asia north of the Himalayas, Siberia and northern China to Japan)
IO
Indian Ocean
LA
Latin America (Middle and South America)
MA
Middle America (Mexico through Panama)
NA
North America (includes the Caribbean)
NO
Northern oceans
OR
Oriental Region (South Asia from Pakistan to Taiwan, plus Southeast Asia, the Philippines, and Greater Sundas)
