David Tipling / Blue-winged teal (Anas discors) male, Viera Wetlands, Florida, USA. March.

Alan Murphy/ BIA / Blue-winged Teal (Anas discors) males flying, Texas

Ingo Arndt / Aerial view of Blue-winged teal (Anas discors) flock flying with Great Blue Heron (Ardea herodias) on the ground, Everglades National Park, Florida, USA, January.

Ingo Arndt / Blue-winged teal (Anas discors) aerial of flock flying, Everglades National Park, Florida, USA, January 2015.

Ingo Arndt / Blue-winged Teal (Anas discors) flock taking flight, aerial, Everglades National Park, Florida, USA, January.

Ingo Arndt / Blue-winged Teal (Anas discors) flock swimming, aerial, Everglades National Park, Florida, USA, January.

Roger Powell / Blue-winged teal (Anas discors) male on water, La Chua Trail, Payne Priarie Reseve, Gainsville, Florida, USA, April

Roger Powell / Blue-winged teal (Anas discors) male escorting female while feeding, La Chua Trail, Payne Priarie Reseve, Gainsville, Florida, USA, April

Alan Murphy/ BIA / Blue-winged Teal (Anas discors) male, Texas

Claudio Contreras / Blue-winged teal (Anas discors) male, Xochimilco wetlands, Mexico City, March

Claudio Contreras / Blue-winged Teal (Anas discors) male, Xochimilco wetlands, Mexico City, March

Claudio Contreras / Cinnammon teal (Spatula cyanoptera septentrionalium) male and two Blue-winged teal (Anas discors) males, Xochimilco wetlands, Mexico City, March