| Titre : | Journal of Field Ornithology 80(1) - MAR 2009 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Carol A. Devney, Auteur ;
Shannon L. Kondrad, Auteur ;
Katherine R. Stebbins, Auteur ;
Kevin D. Brittingham, Auteur ;
David J. Hoffman, Auteur ;
Gary H. Heinz, Auteur
Field studies on nesting birds sometimes involve questions related to nest initiation dates, length of the incubation period, or changes in parental incubation behavior during various stages of incubation. Some of this information can be best as[...]
Article
Scott McConnell, Auteur ;
Timothy J. O'Connell, Auteur ;
David M. Leslie, Auteur ;
John S. Shackford, Auteur
Mountain Plover (Charadrius montanus) populations are inefficiently sampled by Breeding Bird Surveys. As a result, targeted sampling of select populations of this species (with an estimated global population of 11,000-14,000 birds) can be valuab[...]
Article
CONOR P. McGOWAN, Auteur ;
Joshua J. Millspaugh, Auteur ;
Mark R. Ryan, Auteur ;
Casey D. Kruse, Auteur ;
Greg Pavelka, Auteur
Estimating reproductive success for birds with precocial young can be difficult because chicks leave nests soon after hatching and individuals or broods can be difficult to track. Researchers often turn to estimating survival during the prefledg[...]
Article
Fawen Qian, Auteur ;
Heqi Wu, Auteur ;
Libo Gao, Auteur ;
Huige Zhang, Auteur ;
Fengshan Li, Auteur ;
Xingyao Zhong, Auteur ;
Xiaojun Yang, Auteur ;
Guangmei Zheng, Auteur
Because their breeding and wintering areas are in remote locations, little is known about the biology of Black-necked Cranes (Grus nigricollis), including their migratory behavior. Using satellite telemetry, we monitored the migration of Black-n[...]
Article
Samantha E. Franks, Auteur ;
David B. Lank, Auteur ;
D. Ryan Norris, Auteur ;
Brett K. Sandercock, Auteur ;
Caz M. Taylor, Auteur ;
T. Kurt Kyser, Auteur
Avian age-class discrimination is typically based on the completeness of the first prebasic molt. In several calidrid sandpiper species, juvenal flight feathers grown on Arctic breeding grounds are retained through the first three migrations. Th[...]
Article
Kyle A. Swiston, Auteur ;
Daniel J. Mennill, Auteur
Although offering many benefits over manual recording and survey techniques for avian field studies, automated sound recording systems produce large datasets that must be carefully examined to locate sounds of interest. We compared two methods f[...]
Article
Nathan W. Cooper, Auteur ;
Michael T. Murphy, Auteur ;
Lucas J. Redmond, Auteur
Among migratory passerines, the first birds to arrive on the breeding grounds are usually older males. Early arrival by older birds may be driven by experience, age-dependent changes in body condition, age-dependent access to resources during th[...]
Article
Walter S. Svagelj, Auteur ;
Gustavo J. Fernández, Auteur ;
Myriam E. Mermoz, Auteur
Nest-site selection and nest defense are strategies for reducing the costs of brood parasitism and nest predation, two selective forces that can influence avian nesting success and fitness. During 2001-2002, we analyzed the effect of nest-site c[...]
Article
Katherine Renton, Auteur ;
Donald J. Brightsmith, Auteur
Competition for nest sites by sympatric species can lead to resource partitioning among species. We examined the partitioning of cavity resources by Red-and-green Macaws (Ara chloropterus), Blue-and-yellow Macaws (A. ararauna), and Scarlet Macaw[...]
Article
Distance sampling applied to point count surveys (point transects) has become a common method for estimating the absolute abundance of birds. When conducting point transects, detections of focal species are typically recorded during a fixed time[...]
Article
Fiona Sharpe, Auteur ;
Mark Bolton, Auteur ;
Rob Sheldon, Auteur ;
Norman Ratcliffe, Auteur
Color bands and radio tags are widely used to facilitate individual recognition and relocation of precocial chicks in studies of prefledging survival. However, the accuracy of data collected and subsequent estimates of survival rates rely on the[...]
Article
Antonio Celis-Murillo, Auteur ;
Jill L. Deppe, Auteur ;
Michael F. Allen, Auteur
Point counts are the most frequently used technique for sampling bird populations and communities, but have well-known limitations such as inter- and intraobserver errors and limited availability of expert field observers. The use of acoustic re[...]
