Canvasback Identification Guide

Canvasback

Key facts

Scientific name: Aythya valisineria
UK status: Accidental (rare vagrant)
Global conservation status: Least concern
Length: 53 cm
Wingspan: 80 cm
Weight: 1. 3 kg

Description

The canvasback is a large diving duck with an oval body, thick neck and sloping forehead, and a short tail that slopes down into the water. The breeding male has a pale grey body with fine vermiculation that resembles the weave of a canvas which gives the species its name. The breast and rump are black, the tail is dark brown, and the head is chestnut. It has a long dark bill, red eyes, and grey legs and feet.

The female has a grey-brown body, dark brown breast and foreneck, and light brown head and neck.

In eclipse plumage, the male resembles the female and the red eye is duller.

In non-breeding season, the canvasback is gregarious, and will form mixed species flocks with redheads and scaups.

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Diet

Canvasbacks are omnivorous, diving underwater for plant tubers, seeds, buds, roots, snails and clams.

They can dive to depths of 2 metres to extract pieces of aquatic plants but will sometimes feed by dabbling just below the surface. They feed during the day and night.

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Range and habitat

Canvasbacks breed from south Alaska to Nebraska and Minnesota in lakes, deep-water marshes, bays, and ponds. In winter it migrates south to the mid-Atlantic United States and Mexico where it can be found on deep freshwater lakes and marshes and coastal regions.

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