| Titre : | Journal of Field Ornithology 75(2) - SPR 2004 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
M. Klaassen, Auteur ;
T. Baarspul, Auteur ;
T. Dekkers, Auteur ;
P. van Tienen, Auteur
We reconstructed the nutrient source for egg synthesis by sampling Black-headed Gull (Larus ridibundus) eggs for yolk, analyzing their carbon stable isotope ratio, and comparing that to hatchling down. Most of the variation in carbon stable isot[...]
Article
P. M. Vergara, Auteur ;
J. A. Simonetti, Auteur
Cover at nesting sites selected by breeding birds can reduce the risk of nest predation. Using artificial nests, we tested whether dense cover reduces nest predation upon understory birds (rhinocryptids) in temperate forest of Chile. We compared[...]
Article
J. J. Groombridge, Auteur ;
J. G. Massey, Auteur ;
J. C. Bruch, Auteur ;
T. R. Malcolm, Auteur ;
C. N. Brosius, Auteur ;
M. M. Okada, Auteur ;
B. Sparklin, Auteur
We used differential counts of white blood cells to determine heterophildymphocyte ratios in the Maui Creeper (Paroreomyza Montana), air endemic, non-endangered Hawaiian honeycreeper, as a measure of stress in response to varying distance and ha[...]
Article
P. A. Callo, Auteur
Although predator model presentations are frequently used by ornithologists to study parental care, little is known about the effects of presentations on Subsequent nesting success. Only one of 113 model presentation studies surveyed from the li[...]
Article
S. H. Borges, Auteur ;
L. M. Henriques, Auteur ;
A. Carvalhaes, Auteur
We conducted a short-term Study on density and habitat use in an Amazonian owl assemblage. The census was conducted in terra-firme forest and black-water flooded forest or igapo forest. Six owl species were recorded, the Tropical Screech-owl (Ot[...]
Article
B. D. Linkhart, Auteur ;
R. T. Reynolds, Auteur
A male Flammulated Owl (Otus flammeolus), banded as a breeding adult (age unknown) on 8 July 1988 in central Colorado, was last recaptured on 8 July 2001. On the same study area, a female Flammulated Owl was banded as a breeding adult (age unkno[...]
Article
C. Barbraud, Auteur ;
Yves Kayser, Auteur ;
Damien Cohez, Auteur ;
Michel Gauthier-Clerc, Auteur ;
Heinz Hafner, Auteur
The double observer approach with marked nests was used in southern France for estimating the detection probability of nests of the Squacco Heron (Ardeola ralloides), a cryptic species in its breeding behavior. Results indicate that the detectio[...]
Article
S. F. Lovell, Auteur ;
M. R. Lein, Auteur
Song variation has been studied extensively over the past 50 yr but almost entirely in oscine passerines. Although learning is an essential component of song development in most, if not all, oscines, there is no definitive evidence for song lear[...]
Article
T. J. Underwood, Auteur ;
S. G. Sealy, Auteur ;
C. M. McLaren, Auteur
Brown-headed Cowbird (Molothrus ater) parasitism on pewees (Contopus spp.) is uncommon or rare in North America, suggesting that pewees sympatric with cowbirds either reject cowbird eggs or are not selected by cowbirds for parasitism, or that co[...]
Article
P. Pyle, Auteur ;
A. McAndrews, Auteur ;
P. Velez, Auteur ;
R. L. Wilkerson, Auteur ;
R. B. Siegel, Auteur ;
D. F. DeSante, Auteur
Data from a banding station at Guantanamo Bay and the examination of 830 specimens were used to study molt patterns and criteria for determination of age and sex in 15 resident species Of Cuban landbirds. All 15 species undergo their prebasic mo[...]
Article
D. I. Rogers, Auteur ;
P. F. Battley, Auteur ;
J. Sparrow, Auteur ;
A. Koolhaas, Auteur ;
C. J. Hassell, Auteur
Shorebirds held during banding activities can develop muscle cramps, especially when temperatures are high and birds are heavy. Such capture myopathy can be fatal or tender birds vulnerable to predators. We rehabilitated Great Knots (Calidris te[...]
Article
C. A. Howell, Auteur ;
P. A. Porneluzi, Auteur ;
R. L. Clawson, Auteur ;
J. Faaborg, Auteur
We compared 50-m fixcd-radius point-count detections for four bird species with density data from spot-mapping in order to evaluate the relationship between monitoring methodologies. We conducted this study in five Missouri oak-hickory forest St[...]
Article
D. L. Major, Auteur ;
C. A. Barber, Auteur
We determined if extra-pair paternity existed in an eastern population of Song Sparrows (Melospiza melodia melodia), and compared the frequency of extra-pair paternity in first and second broods. Over both broods, a total of 10.5% young were of [...]
Article
O. W. Johnson, Auteur ;
P. L. Bruner, Auteur ;
P. M. Johnson, Auteur ;
A. E. Bruner, Auteur
We monitored a marked Pacific Golden-Plover (Pluvialis fulva) over many seasons on a wintering ground in Hawaii. The bird died at a minimum age of 21 yr 3 mo, thus demonstrating the potential for a long lifespan in some individuals and setting a[...]
Article
D. G. McMaster, Auteur ;
D. L. H. Neudorf, Auteur ;
S. G. Sealy, Auteur ;
T. E. Pitcher, Auteur
We documented the time of day of laying and the total time spent on the nest chiring laying (laying bout) in 21 species of passerine birds and the brood-parasitic Brown-headed Cowbird (Molothrus ater) at Delta Marsh, Manitoba, between 1989 and 1[...]
