Common Teal (Anas crecca crecca) form of Green-winged Teal on the AOU list, also known as Common Teal (Anas crecca) on BOU list.
Anas crecca crecca and Anas crecca nimia were formerly considered to be a separate species (from Green-winged Teal) with the name Common Teal, and seem likely to be treated as a separate species again. Anas crecca carolinensis is the duck familiarly known to North Americans as the Green-winged Teal in English, Sarcele a ailes vertes in French, and Cerceta Aliverde in Spanish.