TROPICAL BIRDS DOWNSIZED ORGANS

Breeding Strategies of Tropical Birds

Birds as predators in tropical agroforestry systems.

Insectivorous birds reduce arthropod abundances and their damage to plants in some, but not all, studies where predation by birds has been assessed. The variation in bird effects may be due to characteristics such as plant productivity or quality, habitat complexity, and/or species diversity of predator and prey assemblages. Since agroforestry systems vary in such characteristics, these systems...

South temperate birds have higher apparent adult survival than tropical birds in Africa

P. Lloyd ([email protected]), Percy FitzPatrick Inst., DST/NRF Centre of Excellence, Univ. of Cape Town, P/Bag X3, Rondebosch, 7701, South Africa, and Biodiversity Assessment and Management Pty Ltd, PO Box 1376, Cleveland 4163, Australia. – F. Abadi, South African National Biodiversity Inst., P/Bag X7, Claremont 7735, South Africa, and School of Statistics and Actuarial Science, Univ. of Wit...

Extrapair Paternity and Sexual Selection in Socially Monogamous Birds: Are Tropical Birds Different?

!e Auk, Vol. , Number , pages –. ISSN -, electronic ISSN -.  by !e American Ornithologists’ Union. All rights reserved. Please direct all requests for permission to photocopy or reproduce article content through the University of California Press’s Rights and Permissions website, http://www.ucpressjournals. com/reprintInfo.asp. DOI: ./auk.. S...

Simulated Birdwatchers’ Playback Affects the Behavior of Two Tropical Birds

Although recreational birdwatchers may benefit conservation by generating interest in birds, they may also have negative effects. One such potentially negative impact is the widespread use of recorded vocalizations, or "playback," to attract birds of interest, including range-restricted and threatened species. Although playback has been widely used to test hypotheses about the evolution of beha...