Claudio Contreras / Ruddy duck (Oxyura jamaicensis jamaicensis) male in courtship display, Xochimilco wetlands, Mexico City, Mexico. August.

Claudio Contreras / Ruddy duck (Oxyura jamaicensis jamaicensis) male taking off, Xochimilco wetlands, Mexico City, Mexico. August.

Claudio Contreras / Ruddy duck (Oxyura jamaicensis jamaicensis) male taking off, Xochimilco wetlands, Mexico City, Mexico. August.

Glenn Bartley / Andean Teal (Anas andium), Ecuador

Glenn Bartley / Andean Teal (Anas andium) pair, Ecuador

Pete Oxford / Andean teal duck with ducklings {Anas andium} Cajas NP, paramo, Andes, Ecuador

Pete Oxford / Andean teal duck male {Anas andium} Cajas NP, Ecuador

Pete Oxford / Andean teal duck with ducklings {Anas andium} Cajas NP. Ecuador

Pete Oxford / Andean teal duck with ducklings {Anas andium} Cajas NP, paramo, Andes, Ecuador

Glenn Bartley/ BIA / Andean Teal (Anas andium), Ecuador

Claudio Contreras / Ruddy duck (Oxyura jamaicensis) taking flight from river with reedbeds behind, Cienega de Santa Clara, Colorado River, Sonora, Mexico.

Charlie Summers / Ruddy duck (Oxyura jamaicensis) drakes fight over female during breeding season, Colorado, USA, July.