Moult mi­gra­tion

BBC Wildlife Magazine - - Wild July -

The large shel­duck stands out by a mile on our es­tu­ar­ies, salt-marshes and coastal la­goons. It has a unique mi­gra­tion strat­egy. To­wards the end of sum­mer, af­ter rais­ing their young, our en­tire pop­u­la­tion de­camps to sev­eral an­ces­tral moult­ing grounds. Most birds move to Ger­many’s shal­low North Sea coast, while oth­ers go to the Wash, off East Anglia, or to Bridg­wa­ter Bay in Som­er­set. Hav­ing moulted into win­ter plumage, they re­turn and dis­perse around the coun­try. FIND OUT MORE Bri­tish birds: bto.org/bird­facts

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