| Titre : | Journal of Field Ornithology 88(4) - Dec, 2017 |
| Type de document : | Bulletin |
| Paru le : | 01/12/2017 |
Dépouillements
Article
Tara L. Imlay, Auteur ;
Rolanda J. Steenweg, Auteur ;
Belen Garcia-Perez, Auteur ;
Keith A. Hobson, Auteur ;
Sievert Rohwer, Auteur
Molt is energetically demanding and various molt strategies (i.e., molt series, duration, intensity, timing, and location) have evolved to reduce the negative fitness consequences of this process. As such, molt varies considerably among species.[...]
Article
Amie S. Sommers, Auteur ;
W. Alice Boyle, Auteur ;
Liam P. McGuire, Auteur
Plasma metabolite analysis is frequently used to assess the energetic state and energy intake of birds. Plasma β-hydroxybutyrate (BUTY) is a common metabolite used in these studies, and is correlated with fasting and mass loss. BUTY is typically[...]
Article
Eric M. Wood, Auteur ;
Sara Barker Swarthout, Auteur ;
Wesley M. Hochachka, Auteur ;
Ronald W. Rohrbaugh, Auteur ;
Kenneth V. Rosenberg, Auteur ;
Amanda D. Rodewald, Auteur
Conventional surveys designed to monitor common and widespread species may fail to adequately track population changes of rare or patchily distributed species that are often of high conservation concern. We evaluated the performance of a new mon[...]
Article
Alberto Macias-Duarte, Auteur ;
Arvind O. Panjabi, Auteur ;
Erin H. Strasser, Auteur ;
Greg J. Levandoski, Auteur ;
Irene Ruvalcaba-Ortega, Auteur ;
Paul F. Doherty, Auteur ;
Carmen I. Ortega-Rosas, Auteur
Populations of grassland birds that overwinter in the Chihuahuan Desert are declining more rapidly than other grassland birds, and survival during the non-breeding season may have a strong influence on population trends of these species. Habitat[...]
Article
Nathan C. Johnson, Auteur ;
Susan M. Haig, Auteur ;
Stephen M. Mosher, Auteur ;
Jeff P. Hollenbeck, Auteur
Mariana Swiftlets (Aerodramus bartschi) are federally listed as endangered, with populations currently limited to just three islands in the Mariana Islands plus an introduced population on the Hawaiian island of O'ahu. Before efforts are made to[...]
Article
Julio C. Gallardo, Auteur ;
Francisco J. Vilella, Auteur
Sharp-shinned Hawks (Accipiter striatus) are forest raptors that are widely distributed in the Americas. A subspecies endemic to Puerto Rico (A. s. venator) is listed as endangered and restricted to mature and old secondary montane forests and s[...]
Article
Kristina L. Cockle, Auteur ;
Alejandro Bodrati, Auteur
The Neotropical ovenbirds (Furnariidae) are an adaptive radiation of suboscines renowned for the diversity of their nests. Like most altricial insectivores, they generally exhibit biparental care. One tribe, Philydorini, includes 46 species thou[...]
Article
Luciana Barçante, Auteur ;
Mariana M. Vale, Auteur ;
Maria Alice S. Alves, Auteur
Altitudinal migration is the seasonal altitudinal movement of birds from breeding areas to non-breeding or wintering areas at different elevations. Although this type of migration is widely reported, questions remain concerning the number of spe[...]
