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Examples of Tropical Frugivores Defending Fruit-Bearing Plants
Thane K. Pratt
Vol. 86, No. 2 (May, 1984), pp. 123-129
Published by: American Ornithological Society
Stable URL: http://www.jstor.org/stable/1367024
Page Count: 7
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In the tropics, birds have not been shown to defend fruit-bearing trees or vines, even though tropical birds defend other sources of food at high density, particularly flowers. I studied foraging of frugivorous birds in New Guinea and describe here four examples of feeding territories at fruiting woody plants: 1) a female Blue Bird of Paradise (Paradisaea rudolphi) at Schefflera pachystyla, 2) a male Indian Koel (Eudynamis scolopacea) at Chisocheton sp., 3) a male Cinnamon-breasted Wattlebird (Melidectes torquatus) at Dendrocnide ternatensis, and 4) a Reinwardt's Long-tailed Pigeon (Reinwardtoena reinwardtsi) at Schefflera chaetorrhachis. The birds of paradise, wattlebird and pigeon were individually recognizable. All four holders of feeding territories ("defenders") attempted to chase away all other visiting birds ("visitors") and succeeded, except in the case of the wattlebird, where some visitors were larger than it was. Chases were not always followed by feeding. Defenders either spent long periods at their feeding territories or visited them repeatedly. They held their feeding territories over several days.
The Condor © 1984 Cooper Ornithological Society