| Titre : | Journal of Field Ornithology 74(3) - SUM 2003 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Gaëtan Lefebvre, Auteur ;
Brigitte Poulin, Auteur
Ecological studies and population surveys sometimes require information on the position of individuals. Because many birds are more audible than visible, we tested the potential of acoustic triangulation for locating Great Bitterns (Botaurus ste[...]
Article
T. D. Ruhlen, Auteur ;
S. Abbott, Auteur ;
L. E. Stenzel, Auteur ;
G. W. Page, Auteur
Disturbance from human recreation may impact vulnerable life stages of beach-nesting plovers (Charadrius spp.). Although human recreation may decrease hatching success of Snowy Plovers (C alexandrinus), we are unaware of any studies indicating a[...]
Article
J. P. Isacch, Auteur ;
M. M. Martinez, Auteur
This study describes annual variation in abundance and population status of non-breeding migratory shorebirds in flooding pampa grasslands of Argentina. We studied two Nearctic species, the American Golden-Plover (Pluvialis dominica) and the Buf[...]
Article
R. S. Sawin, Auteur ;
M. W. Lutman, Auteur ;
G. M. Linz, Auteur ;
W. J. Bleier, Auteur
Predation has consistently been identified as the most common cause of nest failure for Red-winged Blackbirds (Agelaius phoeniceus). During May and June, 2000 and 200 1, we used infrared-triggered camera systems to identify potential nest predat[...]
Article
D. N. Koons, Auteur ;
J. J. Rotella, Auteur
Despite the fact that Lesser Scaup and Ring-necked Ducks are closely related and nest in similar habitats, the two species have inverse population trends. To evaluate the hypothesis that the difference in trends could be related to differences i[...]
Article
P. C. Frederick, Auteur ;
B. Hylton, Auteur ;
J. A. Heath, Auteur ;
M. Ruane, Auteur
The accuracy of aerial estimates of avian aggregation sizes is variable across studies, and the relative importance of techniques and inter-observer error to this variation are poorly understood. Using a scaled physical model of a wading bird co[...]
Article
I. Jimenez, Auteur ;
G. A. Londono, Auteur ;
C. D. Cadena, Auteur
Curassows are among the most threatened Neotropical birds, so reliable methods for estimating their abundance are needed to discern distribution patterns and manage populations. Based on the assumptions that the distance to booming curassows can[...]
Article
C. Mitrus, Auteur
I compared the breeding ecology of Collared Flycatchers (Ficedula albicollis) breeding in natural and artificial nest sites in old-growth, oak-lime-hornbeam stands of the Bialowieza Forest, eastern Poland, from 1993 to 1999. There were no signif[...]
Article
R. Duraes, Auteur ;
M. A. Marini, Auteur
Tartar emetic is frequently used to force regurgitation in birds, allowing the study of diet while minimizing mortality. However, the responsiveness to the emetic in terms of regurgitation and mortality rates has been shown to be highly species-[...]
Article
C. L. Ramjohn, Auteur ;
F. B. Lucas, Auteur ;
F. E. Hayes, Auteur ;
S. T. Ballah, Auteur ;
N. C. Johnson, Auteur ;
K. M. Garcia, Auteur
We provide the first description of lek mating behavior in the Sooty-capped Hermit (Phaethornis augusti) based on four days of observation of unmarked birds at a lek in the Paria Peninsula of Venezuela. A minimum of six presumed males displayed [...]
Article
J. R. Liebezeit, Auteur ;
T. L. George, Auteur
We compared the effectiveness and reliability of mechanically egg-triggered set-cameras and time-lapse video cameras in identifying nest predators at active Dusky Flycatcher (Empidonax oberholseri) nests in Siskiyou County, California. We monito[...]
Article
J. W. Hupp, Auteur ;
G. A. Ruhl, Auteur ;
J. M. Pearce, Auteur ;
D. M. Mulcahy, Auteur ;
M. A. Tomeo, Auteur
We examined whether surgically-implanted radio transmitters with percutaneous antennas affected behavior of Lesser Canada Geese (Branta canadensis parvipes) in Anchorage, Alaska. We implanted either a 26-g VHF radio transmitter or a larger VHF r[...]
Article
S. G. Sealy, Auteur
The time of day of laying and the intervals between successive eggs in clutches of the Black-billed Cuckoo (Coccyzus erythropthalmus) have been incompletely documented. With observations bracketing the laying time of eggs, I determined that six [...]
Article
Article
W. S. Svagelj, Auteur ;
M. E. Mermoz, Auteur ;
G. J. Fernandez, Auteur
We compared predation rates of artificial nests baited with different egg types with the predation rates on nests of the Brown-and-yellow Marshbird (Pseudoleistes virescens), a Neotropical passerine common in the same area, in Argentina. We used[...]
Article
Fledging success is widely used as an index of reproductive success in avian studies, but survival of young after fledging is rarely estimated. In this study, I used radio telemetry to measure rates and causes of mortality of 63 Black-fronted Te[...]
