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birdsong
WORDNET DICTIONARY
Noun birdsong has 1 sense
- birdsong(n = noun.communication) birdcall, call, song - the characteristic sound produced by a bird; "a bird will not learn its song unless it hears it at an early age" is a kind of animal communication
has particulars: bell-like call, two-note call
For further exploring for "birdsong" in Webster Dictionary Online