| Titre : | Journal of Field Ornithology 80(2) - JUN 2009 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Lewis G. Halsey, Auteur ;
Steven J. Portugal, Auteur ;
Jennifer A. Smith, Auteur ;
Campbell P. Murn, Auteur ;
Rory P. Wilson, Auteur
Measuring body movements using accelerometry data loggers is a relatively new technique, the full applicability of which has yet to be tested on volant birds. Our study illustrates the potential of accelerometry for research on large birds by us[...]
Article
Michelle L. Carder, Auteur ;
Gary Ritchison, Auteur
Eastern Phoebes (Sayornis phoebe) persistently pump their tails when perched, and the function of this behavior is unclear. We tested four hypotheses concerning the possible functions of tail pumping, including the (1) balance hypothesis, (2) si[...]
Article
Fred Bassett, Auteur ;
Doreen Cubie, Auteur
Over the past several decades, there have been numerous reports of hummingbirds wintering in the southeastern United States. However, little is known about the species present and their relative abundance. From November 1998 to March 2008, we ex[...]
Article
Melissa L. Evans, Auteur ;
Bonnie E. Woolfenden, Auteur ;
Lyle Friesen, Auteur ;
Bridget J. M. Stutchbury, Auteur
The application of molecular tools to studies of avian mating systems has revealed that most songbird species engage in extra-pair matings. However, little is known about the possible effects of habitat fragmentation on extra-pair mating systems[...]
Article
M. Jeri Imansyah, Auteur ;
Tim S. Jessop, Auteur ;
Joanna Sumner, Auteur ;
Deni Purwandana, Auteur ;
Achmad Ariefiandy, Auteur ;
Aganto Seno, Auteur
Megapodes are unique in using only heat from the environment, rather than body heat, to incubate their eggs as well as the precocious independence of their chicks on hatching. Of 22 recognized species of megapodes, 9 are listed as threatened due[...]
Article
Anthony J. Gaston, Auteur ;
Sebastien Descamps, Auteur ;
H. Grant Gilchrist, Auteur
Despite being widespread and easily observed, little is known about the life history of Glaucous Gulls (Larus hyperboreus). From 1984 to 2007, we examined their breeding biology and demography at Coats Island, Nunavut, Canada, where they nest al[...]
Article
Nest predation is often the primary cause of nest failure for passerines. Despite this, little is known about predation rates and the nest predators of birds in the tropics. I used video cameras to monitor seven Lance-tailed Manakin (Chiroxiphia[...]
Article
Patrice Bourgault, Auteur ;
Philippe Perret, Auteur ;
Marcel M. Lambrechts, Auteur
Resource constraints may impose physiological limitations on egg production and influence the timing of breeding in seasonally breeding birds. Food-supplementation experiments have demonstrated that food availability may influence the timing of [...]
Article
Nicholas M. Anich, Auteur ;
Thomas J. Benson, Auteur ;
James C. Bednarz, Auteur
Although radio telemetry can provide useful information, the possible negative effects of transmitters, including biased results and detrimental effects on the birds, must also be considered. Several investigators have examined the effects of tr[...]
Article
Ryan S. Brady, Auteur ;
James D. Paruk, Auteur ;
Anthony J. Kern, Auteur
Northern Shrikes (Lanius excubitor) are predatory songbirds found primarily in taiga regions throughout their Holarctic breeding range. The species is poorly known, especially in North America, and is generally thought to be sexually monomorphic[...]
Article
Scott A. Rush, Auteur ;
Tom Maddox, Auteur ;
Aaron T. Fisk, Auteur ;
Mark S. Woodrey, Auteur ;
Robert J. Cooper, Auteur
Relationships between egg volume and an array of life-history traits have been identified for many bird species. Despite the importance of egg volume and the need for precise and accurate measurements, egg volume is usually estimated using a mat[...]
Article
Kara J. Gebhardt, Auteur ;
Donald Brightsmith, Auteur ;
George Powell, Auteur ;
Lisette P. Waits, Auteur
Conservation genetic analyses of wildlife have increased greatly in the past 10 yr, yet genetic studies of parrots are rare because of difficulties associated with capturing them and obtaining samples. Recent studies have demonstrated that molte[...]
Article
Jerome P. Brewster, Auteur ;
Theodore R. Simons, Auteur
Recent advances in the methods used to estimate detection probability during point counts suggest that the detection process is shaped by the types of cues available to observers. For example, models of the detection process based on distance-sa[...]
