| Titre : | Journal of Field Ornithology 83(4) - DEC 2012 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Luciano N. Segura, Auteur ;
Juan C. Reboreda, Auteur
The main cause of nest mortality for most bird species is predation and nest survival rates often vary in relation to time-specific variables. Few investigators have examined time-specific patterns of nest survival in Neotropical birds, and most[...]
Article
Esteban Botero-Delgadillo, Auteur ;
Nicholas J. Bayly, Auteur
Morphology is commonly used as a predictor of ecological relationships among species when studying local assemblages of Neotropical birds. Nevertheless, most evidence supporting ecomorphological correspondence in birds comes from studies of comm[...]
Article
Kyle G. Horton, Auteur ;
Sara R. Morris, Auteur
Stopover-site quality has often been assessed using changes in the body mass of migrants estimated from individuals recaptured on subsequent days or using regression methods. We compared estimates of mass change using these two techniques to est[...]
Article
Margaret Campbell, Auteur ;
Charles M. Francis, Auteur
Point count surveys are widely used for monitoring songbird populations, but little is known of the effect of the observer on songbird behavior during point counts. We used a novel, wireless array of recorders to determine the location of singin[...]
Article
Collecting blood from neonatal or prehatched chicks is sometimes necessary, requiring specialized blood collection techniques and skills. However, such sampling can be difficult and could potentially have adverse effects. I developed a method fo[...]
Article
Perri Eason, Auteur ;
Bassim Rabea, Auteur ;
Omar Attum, Auteur
Populations of many seabirds and other species that nest along coasts are declining due to habitat degradation and loss. An improved understanding of the species-specific factors that determine nest density across a landscape is therefore critic[...]
Article
Fabio Raposo do Amaral, Auteur ;
Vitor de Q. Piacentini, Auteur ;
Guilherme R. R. Brito, Auteur ;
Felipe F. Curcio, Auteur
Scientific collections are important sources of material for many areas of ornithological research. Although firearms (particularly shotguns) have been the standard for avian scientific collecting for more than 100 years, their use is restricted[...]
Article
Natasha D. G. Hagemeyer, Auteur ;
Rachel J. Sturge, Auteur ;
Kevin E. Omland, Auteur ;
J. Jordan Price, Auteur
Orchard Orioles (Icterus spurius) and Fuertes Orioles (I. fuertesi) recently diverged from each other, making them an ideal system for investigating trait evolution and mechanisms of reproductive isolation during the early stages of speciation. [...]
Article
Nathan W. Cooper, Auteur ;
Mark A. Thomas, Auteur ;
Megan B. Garfinkel, Auteur ;
Katherine L. Schneider, Auteur ;
Peter P. Marra, Auteur
Devising methods for sampling arthropods presents many challenges, including understanding possible differences in results obtained by different individuals (precision), investigating differences between estimates and the actual variable of inte[...]
Article
William C. Holimon, Auteur ;
Jennifer A. Akin, Auteur ;
William H. Baltosser, Auteur ;
Catherine W. Rideout, Auteur ;
C. Theo Witsell, Auteur
Smith's Longspurs (Calcarius pictus) are a species of concern in North America because of their limited range and apparent low population size. To better understand winter habitat needs and guide management of this species, we examined habitat a[...]
