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BRITISH WARBLERS
peculiar rattling sound, the clear notes then follow and continue for some minutes in succession. In addition to the song there are numerous call notes, difficult to express in words, but the one most frequently used resembles the call note of the Hawfinch, so that when a number of males are close together the sound produced reminds one of a small flock of that species in flight. To my ear the call note of the female appears to be somewhat different from that of the male.
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