Mike Potts / New Zealand scaup (Aythya novaeseelandiae) on Lake Wanaka, South Island, New Zealand.

Andy Trowbridge / New Zealand Scaup (Aythya novaeseelandiae) in flight. Lake Forsyth, Banks Peninsula, Christchurch, New Zealand. July.

Andy Trowbridge / New Zealand Scaup (Aythya novaeseelandiae) in water, late evening light. Christchurch, New Zealand. July.

Andy Trowbridge / New Zealand scaup (Aythya novaeseelandiae) bathing. Christchurch, South Island, New Zealand. July.

Brent Stephenson / Adult female New Zealand scaup (Aythya novaeseelandiae) swimming across the surface of a pond. Waikanae Estuary, Wellington, New Zealand, August.

Brent Stephenson / Adult male New Zealand scaup (Aythya novaeseelandiae) flapping its wings. Lake Rotorua, Bay of Plenty, New Zealand, July.

Jan Wegener / New Zealand Scaup (Aythya novaeseelandiae), New Zealand

Jan Wegener / New Zealand Scaup (Aythya novaeseelandiae) male, New Zealand

Jan Wegener / New Zealand Scaup (Aythya novaeseelandiae) female, New Zealand

Jan Wegener / New Zealand Scaup (Aythya novaeseelandiae), New Zealand

Andy Trowbridge / New Zealand Scaup (Aythya novaeseelandiae) at rest, early morning light, Lake Alexandrina, Mackenzie Basin, South Island, New Zealand. December.

Brent Stephenson / Adult male New Zealand Scaup (Aythya novaeseelandiae) swimming. Western Springs Park, Auckland, New Zealand.