| Titre : | Journal of Field Ornithology 82(3) - SEP 2011 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Emily L. Weiser, Auteur ;
Abby N. Powell, Auteur
Samples such as regurgitated pellets and food remains have traditionally been used in studies of bird diets, but these can produce biased estimates depending on the digestibility of different foods. Stable isotope analysis has been developed as [...]
Article
Jennifer L. Goyette, Auteur ;
Robert W. Howe, Auteur ;
Amy T. Wolf, Auteur ;
W. Douglas Robinson, Auteur
Nocturnal bird assemblages are poorly known in most tropical locations, and information about their presence and behavior is often limited to the results of dawn or dusk surveys. We investigated the use of manual and automatic-detection methods [...]
Article
Megan L. Elrod, Auteur ;
Nathaniel E. Seavy, Auteur ;
Renee L. Cormier, Auteur ;
Thomas Gardali, Auteur
In some passerines, the extent of preformative molt varies among individuals. Wrentits (Chamaea fasciata) undergo either a complete preformative molt or an eccentric (i.e., incomplete) preformative molt where some juvenile remiges are retained t[...]
Article
Joshua P. Martin, Auteur ;
Stéphanie M. Doucet, Auteur ;
Ryan C. Knox, Auteur ;
Daniel J. Mennill, Auteur
The allometric relationship between body size and song frequency has been established in previous studies of temperate and tropical bird communities. However, the relationship between body size and the frequency of distress calls has been examin[...]
Article
Criteria for delisting Golden-cheeked Warblers (Dendroica chrysoparia) include protection of sufficient breeding habitat to ensure the continued existence of 1000 to 3000 singing males in each of eight recovery regions for >= 10 consecutive year[...]
Article
Assumptions that populations of cavity-nesting birds are limited by access to nest sites have largely been based on anecdotal reports or correlative data. Nest-box-addition experiments or tree-cavity-blocking experiments are potentially rigorous[...]
Article
Jennifer M. Arnold, Auteur ;
Rafael Ordonez, Auteur ;
David A. Copeland, Auteur ;
Rungun Nathan, Auteur ;
Joshua M. Scornavacchi, Auteur ;
Donald J. Tyerman, Auteur ;
Stephen A. Oswald, Auteur
Heart rate is a useful physiological index for studies of stress, locomotion, and activity patterns. Measuring heart rates of birds without the need to handle individuals is desirable when trapping is problematic or may cause unwanted disturbanc[...]
Article
Luc te Marvelde, Auteur ;
Simone L. Webber, Auteur ;
Arnold B. van den Burg, Auteur ;
Marcel E. Visser, Auteur
The physiological condition of female birds during the egg-laying and incubation periods is of considerable interest and yet is relatively understudied in wild birds, primarily due to the difficulty of catching birds during this period without c[...]
Article
Scott A. Hatch, Auteur ;
Verena A. Gill, Auteur ;
Daniel M. Mulcahy, Auteur
Factors affecting winter survival may be key determinants of status and population trends of seabirds, but connections between breeding sites and wintering areas of most populations are poorly known. Pelagic Cormorants (Phalacrocorax pelagicus; [...]
Article
Sarah Baldo, Auteur ;
Daniel J. Mennill, Auteur
The Cracidae rank among the most threatened families of Neotropical birds, and studies of their vocal behavior may help guide conservation and monitoring efforts. We describe the vocal behavior of Great Curassows (Crax rubra), a little-studied C[...]
