| Titre : | Journal of Field Ornithology 83(2) - JUN 2012 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
James Finn, Auteur ;
Jens Carlsson, Auteur ;
Tom Kelly, Auteur ;
John Davenport, Auteur
Birds often fly close to the ground or water. Wind shear theory predicts that wind speeds decline with proximity to the substratum, so birds might be expected to fly lower when flying upwind than when flying downwind. We tested this prediction a[...]
Article
Stephen B. Hager, Auteur ;
Bradley J. Cosentino, Auteur ;
Kelly J. McKay, Auteur
Collisions with windows remain an important human-related threat to bird survival in urban landscapes. Accurately estimating the magnitude of avian mortality at windows is difficult and may be influenced by many sources of error, such as scaveng[...]
Article
Individual color-marking is an essential tool for studying the behavior of free-living birds. Hummingbirds represent a particular challenge for traditional avian color-marking techniques because of their small size and short tarsi. Although seve[...]
Article
Cory J. Gregory, Auteur ;
Stephen J. Dinsmore, Auteur ;
Larkin A. Powell, Auteur ;
Joel G. Jorgensen, Auteur
Long-billed Curlews (Numenius americanus) are shorebirds of high conservation concern in North America. Populations have declined in the last 150 yr primarily due to habitat loss and conversion. We conducted a 2-yr study to estimate the density [...]
Article
Juan Carlos Senar, Auteur ;
Jose Carrillo-Ortiz, Auteur ;
Lluisa Arroyo, Auteur
Most parakeets, parrots, and cockatoos are difficult to mark because of their strong beaks and ability to manipulate items with their feet. We developed a marking method that consists of a numbered tag hung on a neck collar. We used this method [...]
Article
The islands of the Caribbean contain habitat of critical importance to a large number of endemic and resident birds, as well as many overwintering Neotropical migrants, and they rank as a globally outstanding conservation priority ecoregion and [...]
Article
Antonio Celis-Murillo, Auteur ;
Jill L. Deppe, Auteur ;
Michael P. Ward, Auteur
Although acoustic recordings have recently gained popularity as an alternative to point counts for surveying birds, little is known about the relative performance of the two methods for detecting tropical bird species across multiple vegetation [...]
Article
Mountain Plovers (Charadrius montanus) are grassland birds that often breed in close association with colonies of black-tailed prairie dogs (Cynomys ludovicianus). However, not all colonies provide plover nesting habitat or habitat of equal qual[...]
Article
Noriyuki M. Yamaguchi, Auteur ;
Jerry W. Hupp, Auteur ;
Paul L. Flint, Auteur ;
John M. Pearce, Auteur ;
Yusuke Shigeta, Auteur ;
Tetsuo Shimada, Auteur ;
Emiko N. Hiraoka, Auteur ;
Hiroyoshi Higuchi, Auteur
From 2006 to 2009, we marked 198 Northern Pintails (Anas acuta) with satellite transmitters on their wintering areas in Japan to study their migration routes and habitat use in spring staging areas. We hypothesized that the distribution of pinta[...]
Article
Andrea L. Crary, Auteur ;
Paul G. Rodewald, Auteur
Previous studies of Yellow Warblers (Setophaga petechia) indicate that males with heavy melanin-based brown breast streaking are more territorial and obtain more extra-pair copulations than lightly streaked males that provide more parental care [...]
