| Titre : | Journal of Field Ornithology 73(4) - FAL 2002 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
B. C. Fedy, Auteur ;
D. R. Norris, Auteur ;
B. J. M. Stutchbury, Auteur
Males of socially monogamous species may benefit from using behavioral tactics to ensure their paternity of the young produced by their social mates. We tested whether male Hooded Warblers (Wilsonia citrina) use mate guarding and high song outpu[...]
Article
V. Penteriani, Auteur ;
M. Gallardo, Auteur ;
H. Cazassus, Auteur
Surveys of vocalizing individuals are useful in detecting widely dispersed species that are hard to locate visually. We determined whether conspecific density affects spontaneous vocalizations of territorial Eagle Owls (Bubo bubo) and thus creat[...]
Article
J. M. Ruth, Auteur ;
T. R. Stanley, Auteur
We studied Wilson's Warbler (Wilsonia pusilla) and Yellow Warbler (Dendroica petechia) habitat use in allopatric and sympatric populations in the Rocky Mountains of northern Colorado and southeastern Wyoming in order to better understand the dif[...]
Article
B. O. Huntsman, Auteur ;
G. Ritchison, Auteur
Five male Eastern Bluebirds (Sialia sialis) were observed and songs recorded over entire breeding seasons in central Kentucky. Songs consisted of an average of 3.02 notes and the mean time between the beginning of successive songs within a bout [...]
Article
C. Riehl, Auteur
An adult Red-shouldered Hawk (Buteo lineatus) Was observed capturing and consuming an adult Pied-billed Grebe (Podilymbus podiceps) in Louisiana. Pied-billed Grebes, which regularly dive to escape predators, are rarely captured by raptors.
Article
M. S. Rodway, Auteur ;
F. Cooke, Auteur
Few data are available on seasonal changes in winter diet of Harlequin Ducks (Histrionicus histrionicus), especially in relation to their use of Pacific herring (Clupea pallasi) spawn. We used fecal analyses to determine seasonal changes in Harl[...]
Article
G. H. F. Seixas, Auteur ;
G. D. Mourao, Auteur
We studied the reproductive biology of a population of Blue-fronted Amazons (Amazona aestiva) in the Pantanal of Mato Grosso do Sul State, Brazil, between 1997 and 1999. Nesting occurred from August to December. We monitored 94 nests which were [...]
Article
Article
I constructed track-plates resembling short pine branches and attached them to pairs of neighboring pine trees distributed over a 1000-ha area in the Colorado Front Range. I checked track-plates after four and eight days between 24-31 August 200[...]
Article
G. Schalk, Auteur ;
H. J. Dewar, Auteur ;
M. D. Cadman, Auteur
A main goal of the Forest Bird Monitoring Program (FBMP) is to monitor temporal trends in forest-dwelling bird abundance in Ontario. The program has been running for over a decade. The experience gained from this program can provide methodologic[...]
Article
M. A. Whitehead, Auteur ;
S. H. Schweitzer, Auteur ;
W. Post, Auteur
Although reports of Brown-headed Cowbird (Molothrus ater) parasitism have increased in the Southeast over the past 30 yr, the cowbird's status, distribution, and host relations within this region remain largely unknown. We collected information [...]
Article
T. M. Donovan, Auteur ;
C. J. Beardmore, Auteur ;
D. N. Bonter, Auteur ;
J. D. Brawn, Auteur ;
R. J. Cooper, Auteur ;
J. A. Fitzgerald, Auteur ;
R. Ford, Auteur ;
S. A. Gauthreaux, Auteur ;
T. L. George, Auteur ;
W. C. Hunter, Auteur ;
T. E. Martin, Auteur ;
J. Price, Auteur ;
K. V. Rosenberg, Auteur ;
P. D. Vickery, Auteur ;
T. B. Wigley, Auteur
Partners in Flight (PIF) is a consortium of professional and Volunteer scientists and educators that promotes the conservation of landbird species. Central to the PIT conservation effort is the development of Bird Conservation Plans specific to [...]
Article
S. K. Riffell, Auteur ;
B. D. Riffell, Auteur
Red-plumaged birds (red species) may behave more visibly in the presence of a red-orange safety vest that field observers must often wear, but species lacking red plumage (non-red species) may behave less visibly (i.e., the species-confidence hy[...]
