Mechanically produced sounds by birds.

To: Jim Davis <>
Subject: Mechanically produced sounds by birds.
From: Lloyd Nielsen <>
Date: Tue, 15 Feb 2000 22:42:10 +1000

Great-billed Herons bill clap frequently when at a nest prior to egg laying -
done when both birds are standing on the nest.

Lloyd Nielsen
Mt Molloy, Nth Queensland

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