| Titre : | Journal of Field Ornithology 84(1) - MAR 2013 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Ana Paula B. Carneiro, Auteur ;
Jaime E. Jiménez, Auteur ;
Pablo M. Vergara, Auteur ;
Thomas H. White, Auteur
Species in the family Psittacidae may be particularly vulnerable to anthropogenic habitat transformations that reduce availability of suitable breeding sites at different spatial scales. In southern Chile, loss of native forest cover due to agri[...]
Article
Jeffrey A. Stratford, Auteur ;
Philip C. Stouffer, Auteur
Across the Neotropics, small-bodied terrestrial insectivores are sensitive to forest fragmentation and are largely absent from second-growth forests. Despite their sensitivity to forest structure, the microhabitat relationships of these birds ha[...]
Article
John H. Giudice, Auteur ;
Kurt J. Haroldson, Auteur ;
Alison Harwood, Auteur ;
Brock R. McMillan, Auteur
The validity of treating counts as indices to abundance is based on the assumption that the expected detection probability, E(p), is constant over time or comparison groups or, more realistically, that variation in p is small relative to variati[...]
Article
Robert S. Rempel, Auteur ;
Charles M. Francis, Auteur ;
Jeffrey N. Robinson, Auteur ;
Margaret Campbell, Auteur
Acoustic recording systems are being used more frequently to estimate habitat occupancy or relative abundance, and to monitor population trends over time. A potential concern with digital recording systems is that changes in technology could aff[...]
Article
Elizabeth C. MacDonald, Auteur ;
Alaine F. Camfield, Auteur ;
Jill E. Jankowski, Auteur ;
Kathy Martin, Auteur
Incubating birds can incur high energetic costs and, when faced with a trade-off between incubation and foraging, parents may neglect their eggs in favor of their own somatic needs. Extended incubation recesses are an example of neglect, but the[...]
Article
Sadie K. Wright, Auteur ;
G. Vernon Byrd, Auteur ;
Heather M. Renner, Auteur ;
Arthur L. Sowls, Auteur
Red-faced Cormorants (Phalacrocorax urile) are North Pacific endemics recognized as a vulnerable species, but little is known about their breeding ecology. We studied Red-faced Cormorants on St. Paul Island, Alaska, from 1975 to 2009, with more [...]
Article
Alissa M. Fogg, Auteur ;
T. Luke George, Auteur ;
Kathryn L. Purcell, Auteur
Investigators generally pool observations of males and females in studies of the foraging behavior of sexually monochromatic songbirds. However, such pooling can obscure possible intersexual differences. We compared the foraging behavior of male[...]
Article
Hanna L. Mounce, Auteur ;
David L. Leonard, Auteur ;
Kirsty J. Swinnerton, Auteur ;
C. Dustin Becker, Auteur ;
Laura K. Berthold, Auteur ;
Kelly J. Iknayan, Auteur ;
Jim J. Groombridge, Auteur
Maui Parrotbills (Pseudonestor xanthophrys), critically endangered Hawaiian honeycreepers endemic to the island of Maui, are restricted to a single population of approximate to 500 individuals located in remote, mountainous terrain. From January[...]
Article
Laura Luna-Maira, Auteur ;
Gustavo Alarcon-Nieto, Auteur ;
Torbjorn Haugaasen, Auteur ;
DANIEL M. BROOKS, Auteur
Despite being endangered, little is known about the natural history and habitat use of Wattled Curassows (Crax globulosa). From September 2008 to March 2009, we examined habitat associations of this species on three islands in the lower Caqueta [...]
Article
Nicole Schumann, Auteur ;
Peter Dann, Auteur ;
Andrew J. Hoskins, Auteur ;
John P. Y. Arnould, Auteur
Regular monitoring of seabird populations is necessary to improve our understanding of their responses to environmental change and inform conservation management. However, given the difficulty in accessing remote breeding sites and the limited r[...]
