Oscar Dewhurst / Crested duck (Lophonetta specularioides) walking on a frozen Andean lake. Arequipa, Peru. September. Cropped

Mike Read / Crested duck (Lophonetta specularioides specularioides) adult and three ducklings in a freshwater pool, Bleaker Island, Falkland Islands, December.

Glenn Bartley/ BIA / Crested Duck (Lophonetta specularioides) calling, Falkland Islands

Bernard Castelein / Crested Duck (Anas specularioides) Laguna Canapa, Altiplano, Bolivia

Bernard Castelein / Crested duck (Anas specularioides) at Laguna Hedionda, Altiplano, Bolivia

Bernard Castelein / Crested duck (Anas specularioides) two resting on shore of Laguna Canapa, Altiplano, Bolivia

Agustin Esmoris / Crested Duck (Lophonetta specularioides), Puerto Madryn, Argentina

Agustin Esmoris / Crested Duck (Lophonetta specularioides), Puerto Madryn, Argentina

Claudio Contreras / Crested duck (Lophonetta specularioides), Carcass Island, Falkland Islands, October

Claudio Contreras / Crested duck (Lophonetta specularioides) pair, Sea Lion Island, Falkland Islands, October

Claudio Contreras / Crested duck (Lophonetta specularioides) pair, Kidney Island, Falkland Islands, October

Glenn Bartley/ BIA / Crested Duck (Lophonetta specularioides) on pond, Falkland Islands