Mobile bird identification
Bird Field Guide

Red-crested Pochard

Netta rufina
Order: Anseriformes

Family: Anatidae

Genus:  Netta

Species: N. rufina
Note the red bill and chestnut head, the birds underside is very dark with white underwings.

The Male Red-crested Pochard in Winter has a bright chestnut-red 'coiffed' head and a red bill. It's underside and breast is black and the flanks are white.

Adult Male Winter
General distribution:
Usually considered a resident bird with only birds in the very North moving South. Escaped birds from collections have become established in several parts of Southern UK, particularly the South East. Genuine vagrants do occur, usually in the Autumn and Winter.
Habitat:
Breeds in large reed fringed lakes and occasionally sheltered coastal bays. In the UK it is most often seen on freshwater but in Europe it frequently winters on the sea.
Notes:
The Red-crested Pochard is a diving duck. It frequently cross breeds with other ducks especially within the Pochard Genus.
Overall, the female is a light brown bird. The pale face and neck along with the pink bill spot and darker cap help to identify it.
Identifying a Male Red-crested Pochard

*Red bill

Black breast

*Red eye
Thanks to: https://www.flickr.com/photos/ferranp/
* key ID points
Adult Female

White flanks

Identifying a Female Red-crested Pochard
Female Red-crested Pochard

*Pink spot on bill

*Darker brown cap

* key ID points
Thanks to:https://www.flickr.com/photos/yeliseev/;

Mostly pale brown wings and body

*Pale face and neck

Male Red-crested Pochard
Wildfowl (Ducks)

*Bright chestnut red coiffed head

Dark eye and bill

Thanks to:https://www.flickr.com/photos/14730981@N08/;
Male Red-crested Pochard Summer
Male Red-crested Pochard flying
Thanks to:https://www.flickr.com/photos/ferranp/;
Thanks to:Bryan's bird photography
Adult Male Summer (Eclipse)
The Male red-crested Pochard in Summer has similar body plumage to the Female, however the Males eye and bill remain a distinctive red.
The Female Red-crested Pochard is a light brown bird with a pale face and neck. It has a darker brown cap and it's bill is black with a distinctive pink spot near the tip.