Previous research reports bait-fishing in seven different species of ardeids. Our observations of Black-crowned Night Herons (Nycticorax nycticorax) on the island of Oahu, Hawaii, USA are the first to detail both passive and active bait-fishing in the same species. These observations provide support for the hypothesis that passive bait-fishing is a precursor to development of active bait-fishing methods in wading birds.
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1 December 2009
Active and Passive Bait-fishing by Black-Crowned Night Herons
Michael C. Gavin,
Jennifer N. Solomon
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