The Gadwall is similar in size and shape to a mallard, although it is a much rarer dabbling duck. Both sexes have a small white wing patch which shows in flight. The drake is mainly grey with a black bill and black feathers under the tail. The duck is mainly brown.
Ponds, lakes and marshes. Feeds upon mainly aquatic plants and seeds plus a few insects and molluscs.
The nest is a hollow lined with plant matter and some down., often on an island or near water. 5 - 15 cream coloured eggs are incubated by the duck for 28 days.
Uncommon, often seen with Pintail and wigeon. Rarely congregates in flocks and unlike other surface feeding ducks often dives.