| Titre : | Journal of Field Ornithology 74(4) - FAL 2003 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
H. Lloyd, Auteur
Line transects based on distance sampling methodology were used to census nocturnal raptor species in three different primary lowland forest habitats in the Tambopata region, southeastren Peru. Density estimates were calculated for five owl spec[...]
Article
M. A. Stapanian, Auteur ;
T. A. Waite, Auteur
Offshore censuses of birds are lacking for inland seas, such as the Laurentian Great Lakes, but may provide valuable information for managing species that are in conflict with human interests. Birds were counted along 31 established transects in[...]
Article
F. Quintana, Auteur ;
G. Somoza, Auteur ;
M. Uhart, Auteur ;
C. Cassara, Auteur ;
P. Gandini, Auteur ;
E. Frere, Auteur
Male and female Rock Shags (Phalacrocorax magellanicus) are not obviously sexually dimorphic in plumage or size and are thus difficult to distinguish in the field. We evaluated the utility of two different DNA-based techniques for sexing adult R[...]
Article
Slaheddine Selmi, Auteur ;
T. Boulinier, Auteur
We investigated the effect of time of season on the accuracy of species number estimation from point-count data collected at 28 oases from southern Tunisia. Each oasis was visited at the beginning of the breeding season and two months later, whi[...]
Article
J. M. Pearce, Auteur ;
K. S. Bollinger, Auteur
Subspecies of Canada Geese (Branta canadensis) exhibit wide variation in body size across their range. To monitor harvest levels in the Pacific Flyway, biologists commonly use culmen length and plumage color to differentiate among subspecies on [...]
Article
K. L. Balent, Auteur ;
C. J. Norment, Auteur
We studied the breeding biology, site fidelity, and dispersal of Grasshopper Sparrows (Ammodramus savannarum) from 1996 to 2000 in a fragmented landscape in western New York State. Ten fields (1.8-13.2 ha) contained territorial male Grasshopper [...]
Article
To evaluate the status of Florida's threatened Crested Caracara (Caracara cheriway) population, knowledge of life history parameters and population dynamics is required. Using the program MARK, I estimated survival rates for adult and juvenile C[...]
Article
M. F. Amaral, Auteur ;
R. H. F. Macedo, Auteur
Little is known about the life history and reproduction of the Curl-crested Jay (Cyanocorax cristatellus), despite its conspicuousness and endemic status, being restricted primarily to the central Cerrado biome of Brazil. From May 1999 to Decemb[...]
Article
Date of clutch initiation and mean clutch size for an alpine population of American Pipits (Anthus rubescens) in northern Wyoming varied significantly among seven years sampled during 1963-1995. Because American Pipits are obligate ground-nester[...]
Article
E. A. VanderWerf, Auteur ;
L. A. Freed, Auteur
The 'Elepaio (Chasiempis sandwichensis) is a monarch flycatcher endemic to the Hawaiian Islands. Both sexes have a two-year delay in plumage maturation, with distinct first-year and second-year subadult plumages. This study tested hypotheses for[...]
Article
K. R. Mehl, Auteur ;
K. L. Drake, Auteur ;
G. W. Page, Auteur ;
P. M. Sanzenbacher, Auteur ;
S. M. Haig, Auteur ;
J. E. Thompson, Auteur
Development of effective trapping techniques is important for conservation efforts, as marking and subsequent monitoring of individuals is necessary to obtain accurate estimates of demography, movements, and habitat use. We describe a leg-hold n[...]
Article
T. L. Booms, Auteur ;
M. R. Fuller, Auteur
We used solar-powered time-lapse video photography to document nesting Gyrfalcon (Falco rusticolus) food habits in central West Greenland from May to July in 2000 and 2001. We collected 2677.25 h of videotape from three nests, representing 94, 8[...]
Article
E. L. Bull, Auteur
The use of nest boxes by Vaux's Swifts (Chaetura vauxi) was investigated because of the loss of large-diameter hollow trees used for nesting in northwestern North America. Nest attempts and nest success were compared in nest boxes among three ha[...]
