Grey Teal vs Pacific Black Duck

Grey Teal

Anas gracilis

Large488 gWetland

It is identified by the presence of a crimson coloured iris in its eyes, which is relatively more prominent in adult males. It is a mottled brown duck with white and green flashes on its wings. Males and females share the same colouration, in contrast to the related chestnut teal, male and female of which are strikingly different. The grey teal has almost identical colouration to the female chestnut teal and the grey can only be distinguished by its lighter coloured neck and paler face. Juveniles are paler than adults, especially on the head. Voice: The call of the grey teal can be heard as a cuck, cuck, cuck that is relatively rapid and includes a sharp whistle. The male and female calls are different in terms of volume and type. The male's call tends to be more of a whistle, whereas the female's call is very loud and harsh sounding. For short-distance communication, the birds have a softer variation of their calls.

ID text from Wikipedia, CC BY-SA 4.0

Photo: (c) Saryu Mae 前 朝琉, some rights reserved (CC BY), uploaded by Saryu Mae 前 朝琉 · cc-by

Pacific Black Duck

Anas superciliosa

Large883 gWetland

This sociable duck is found in a variety of wetland habitats, and its nesting habits are much like those of the mallard, which is encroaching on its range in New Zealand. It feeds by upending, like other Anas ducks. It has a dark body, and a paler head with a dark crown and facial stripes. In flight, it shows a green speculum and pale underwing. All plumages are similar. The size range is 54–61 cm (21–24 in); males tend to be larger than females, and some island forms are smaller and darker than the main populations.

ID text from Wikipedia, CC BY-SA 4.0

Photo: (c) Tim, some rights reserved (CC BY), uploaded by Tim · cc-by

Photos and recordings are credited to their authors under the licence shown. Full profiles: Grey Teal and Pacific Black Duck.