BIRD CALLS and SONGS
Recordings and sonagrams of the bird sounds of eastern North America and the UK
Sunday, April 18
Nightjar
Nightjar at dusk (June, Herts, 1979).
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every 5-6s the notes speed up
(shortly after sunset, June, Dorset)
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call (Blackbird singing)
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every 5-6s the notes speed up
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