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It has even been put forward that the colours of their eggs are intended to deceive; and those of the dotterel, laid on the open beach, are often mentioned as an instance. The resemblance of the dotterel's egg to a pebble is no greater than the resemblance between many eggs laid in nests and pebbles.
If the whitethroat eggs were taken from the nest and placed among particoloured pebbles such as are common on some shores, it would need care to distinguish them. If the dotterel's eggs were put down among grass, or even among the clods of ploughed land, they would be equally difficult to find.
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