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Tweet of the Day is a series of fascinating stories about our British birds inspired by their calls and songs.

John Aitchison tells the story of the Slavonian grebe. In winter, Slavonian Grebes, with their vermilion eyes, bright and shiny as redcurrants, fly south from Scandinavia and Iceland to spend the winter around our coasts. Their winter plumage is black, grey and white but in spring they moult into their breeding plumage with a rich chestnut throat and belly and golden ear-tufts. A small population breed on a few Scottish Lochs where you might hear their trilling calls.