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"whiteof" - 1 õppematerjal

50
odp

Tundra swans

● Europe, Asia, North America ● Resambles more of a goose than swan ● Estonia – one of the main transit regions for migrating ● Most numerous migratory swan in Estonia Mute swan (kühmnokk-luik) ● Large swan typically range from 140 to 160 cm ● Males larger than females and have a larger knob on their bill ● One of the heaviest flying bird ● Young birds, called cygnest, are not the bright whiteof mature adults, and their bill is dull greyish-black (not orange for the first year) Mute swan Finding food underwater Behaviour ● Nest on large mounds ● Monogamous, reuse the same nest each year ● Food commonly includes agricultural crop plant – oilseed rape, wheat ● Feeding flocks in the winter may cause significant crop damage ● Less vocal than the noisy whooper and Bewic´s sw...

Maakasutuse planeerimise... - Eesti Maaülikool
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