Normally
late to start south, canvasbacks migrate in lines
and irregular V's. In feeding areas, compact flocks
fly in indefinite formations. Their wingbeat is rapid
and noisy; their speed is the swiftest of all our
ducks. Feeding behavior is highly variable. In some
areas they feed at night and spend the day rafted
up in open waters; in other areas they feed inshore
mornings and evenings.
On
the water, body size and head shape distinguish them
from scaups and redheads. Drakes croak, peep, and
growl; hens have a mallard-like quack.
