"incubates" - 1 õppematerjal

Tundra swans

black bill ● Pens (females) – slightly smaller than cobs (males) ● Immatures – white mixed with some dull grey feathering; bills – black, large dirty-pink patch ● In Estonia first nesting - 1979 Whooper swan  Behaviour of whooper swan ● Pair for life, cygnets stay with them all the winter ● Breffered breeding habitat – wetlands ● Both build the nest ● Male will stand guard over the nest while female incubates ● 4 to 7 eggs  Influence of whooper swan ● Much admired in Europe ● National bird of Finland ● Protected species in Estonia Spread  Bewick´s swan (väikeluik) ● Lenght 115 to 140 cm ● Adults – white all over ● Young birds – greyish with a pinkish bill ● Shorter neck, variable bill pattern ● Showing more black than yellow ● Bill is more yellow than black ● Europe, Asia, North America ● Resambles more of a goose than swan