Williamson's Weekly Nature Notes
THE chap who took this picture was Roger Wilmshurst, and it is one of a series of RSPB images.
It shows what all song thrushes do in hot weather '“ break open snails to eat the innards.
They leave these piles of empty shells on the paths, known as thrush anvils. It's a bit like litter louts throwing out their rubbish after a picnic.
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