| Titre : | Journal of Field Ornithology 75(3) - SUM 2004 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
J. S. Placyk, Auteur ;
B. A. Harrington, Auteur
Stopover areas are vital for the successful migration of many species of shorebirds, as they, in part, allow individuals to deposit large quantities of Fat needed to fuel their northward and southward journeys. While much research has focused on[...]
Article
I examined the size of small mammal prey taken by White-tailed Kites (Elanus leucurus) in the Americas from data obtained in the literature and unpublished material from southern Brazil. Mean weight of adult small mammal prey in the kite's diet [...]
Article
M. L. Mallory, Auteur ;
L. Kiff, Auteur ;
R. G. Clark, Auteur ;
T. Bowman, Auteur ;
P. Blums, Auteur ;
A. Mednis, Auteur ;
R. T. Alisauskas, Auteur
Eggs that are abnormally small are called runt eggs, and they occur in clutches across a wide variety of bird species. We surveyed waterfowl researchers to determine the natural frequency of occurrence of runt eggs in wild nesting ducks, geese, [...]
Article
C. E. Moulton, Auteur ;
R. S. Brady, Auteur ;
J. R. Belthoff, Auteur
To investigate the potential expression of territorial behavior of Burrowing Owls (Athene cunicularia) in southwestern Idaho, we used a playback protocol to determine if Burrowing Owls actively defended their nesting site from conspecifics, and [...]
Article
M. J. Johnson, Auteur ;
C. van Riper, Auteur
From 1994-1996 we investigated effects of Brown-headed Cowbird (Molothrus ater) parasitism on Black-throated Sparrow (Amphispiza bilineata) nesting success in the Verde Valley of central Arizona. Of 56 Black-throated Sparrow nests, 52% were para[...]
Article
G. Tomas, Auteur ;
J. Martinez, Auteur ;
S. Merino, Auteur
The blood stress protein response can be used to evaluate physiological or environmental stress in individuals and populations. It is important that sample conservation and transport are correct to avoid confounding effects on protein analyses. [...]
Article
A. L. Podolsky, Auteur ;
T. R. Simons, Auteur ;
J. A. Collazo, Auteur
Food supplementation can be an important experimental technique in studies of avian reproductive ecology, energetics, and parental care. We developed a method of food supplementation suitable for ground-foraging insectivorous passerines and test[...]
Article
J. N. Brzorad, Auteur ;
A. D. Maccarone, Auteur ;
K. J. Conley, Auteur
We studied the prey base, foraging behavior, and energetics of Snowy Egrets (Egretta thula) and Great Egrets (Ardea alba) in the Arthur Kill region of New York-New Jersey during the 2002 breeding season. Prey density increased 10-fold, from 0.12[...]
Article
K. Martin, Auteur ;
G. A. Brown, Auteur ;
J. R. Young, Auteur
Lagopus leucurus saxatilis, a subspecies of White-tailed Ptarmigan endemic to Vancouver Island, is listed as vulnerable by the British Columbia Conservation Data Centre, but little is known about its population status or trends. The only previou[...]
Article
I assessed nest-site characteristics of two cavity-excavating species, the Acorn Woodpecker (Melanerves formicivorus) and Northern Flicker (Colaptes auratus), and two secondary cavity-nesting species, the Flammulated Owl (Otus flammeolus) and We[...]
Article
Nest-dwelling parasites are known to have detrimental consequences for many birds, and thus it may be desirable for management practices to remove these parasites. In addition, manipulation of parasite loads is often necessary for studying host-[...]
