| Titre : | Journal of Field Ornithology 72(1) - WIN 2001 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
H. Sandvik, Auteur ;
R. T. Barrett, Auteur
The effect of investigator activity on Black-legged Kittiwakes (Rissa tridactyla) was assessed using the disturbance caused by an ongoing intensive study investigating chick growth and adult mass loss. Though the effects were small, investigator[...]
Article
K. E. Berlin, Auteur ;
J. C. Simon, Auteur ;
T. K. Pratt, Auteur ;
P. E. Baker, Auteur ;
J. R. Kowalsky, Auteur
We determined the best plumage and morphometric variables for ageing and sexing the Maul Parrotbill (Pseudonestor xanthophrys), an endangered Hawaiian honeycreep er found only on east Maul, Hawaii, by examining and measuring 30 museum specimens [...]
Article
M. L. Legare, Auteur ;
W. R. Eddleman, Auteur
We radio-tagged Black Rails (Laterallus jamaicensis) and located active nests at two sites in Florida from May 1992 to August 1996. We collected telemetry locations from 1-6 h daily during the egg-laying and incubation period. Home range estimat[...]
Article
P. M. Sanzenbacher, Auteur ;
S. M. Haig, Auteur
Killdeers (Charadrius vociferus) are considered a common species that inhabits a wide range of wetland and upland habitats throughout much of North America, yet recent information suggests that they may be declining regionally, if not throughout[...]
Article
T. L. De Santo, Auteur ;
M. F. Willson, Auteur
Creation of forested edges in some landscapes can increase the risk of nest pre dation and consequently lower the reproductive success of forest passerines. This edge effect has not been well studied in western coniferous forests, particularly i[...]
Article
C. A. Peterson, Auteur ;
S. L. Lee, Auteur ;
J. E. Elliott, Auteur
In the Fraser River Delta, scavenging of poisoned waterfowl by raptors during winter has led to secondary anticholinesterase poisoning. During the winters of 1996 and 1998, we used still and video photography to examine scavenging activity on wa[...]
Article
N. Burton, Auteur ;
K. Yasukawa, Auteur
Male Red-winged Blackbirds (Agelaius phoeniceus) are known to give alarm calls in response to the approach of a predator, and to encode information about the level of threat in their calling behavior. To determine whether such sentinel males ale[...]
Article
E. L. Bull, Auteur
Knowledge of the survival of the Pileated Woodpecker (Dryocopus pileatus) is essential in managing viable populations of the species. In eight study areas in northeastern Oregon, survivorship of adult Pileated Woodpeckers was 0.60 after 6 mo, 0.[...]
Article
H. P. Sitters, Auteur ;
P. M. Gonzalez, Auteur ;
T. Piersma, Auteur ;
A. J. Baker, Auteur ;
D. J. Price, Auteur
By radio-tracking and recording the movements of flocks. the distribution of feeding Red Knots (Calidris canutus rufa) was studied day and night at a migration stopover site near San Antonio Oeste, Rio Negro, Argentina in March and April 1998. B[...]
Article
R. M. Degraaf, Auteur ;
T. J. Maier, Auteur
House Sparrow (Passer domesticus) eggs are useful in artificial nest experiments because they are approximately the same size and shell thickness as those of many forest passerines. House Sparrow eggs can be readily collected in quantity by prov[...]
Article
H. B. Freifeld, Auteur ;
D. W. Steadman, Auteur ;
J. K. Sailer, Auteur
We surveyed birds on seven small (
Article
C. R. Brown, Auteur ;
M. B. Brown, Auteur
The percentage of otherwise successful nests containing greater than or equal to 1 unhatched egg in Cliff Swallows (Petrochelidon pyrrhonota) varied inversely with colony size in southwestern Nebraska. Colony-site characteristics other than colo[...]
Article
G. E. Woolfenden, Auteur ;
L. R. Monteiro, Auteur ;
R. A. Duncan, Auteur
A Band-rumped Storm-Petrel (Oceanodroma castro) banded in the Azores was recovered in the Gulf of Mexico south of Pensacola, Florida. Research in breeding colonies in the Azores indicates that two genetically distinct breeding forms of this stor[...]
Article
Article
N. M. Lee, Auteur ;
P. A. R. Hockey, Auteur
Several studies have attempted to calculate the energy intake rates of shorebirds. One method of doing this involves estimating the size of prey items in relation to the bird's bill length, and then using an average bill length to convert this v[...]
Article
C. W. Boal, Auteur ;
B. D. Bibles, Auteur
A common assumption made when conducting broadcast surveys for owls is that vocalizations of larger owls reduce the responsiveness of smaller owls. We tested this assumption by comparing the responsiveness of Elf Owls (Micrathene whitneyi) expos[...]
Article
Sexual differences in maximum diving depths and in the composition of the diet of the Antarctic Shag (Phalacrocorax bransfieldensis) were investigated at Harmony Point, Nelson Island, South Shetland Islands, Antarctica, during the 1995-1996 and [...]
Article
W. D. Robinson, Auteur ;
T. R. Robinson, Auteur
We describe 14 nest predation events witnessed in the Republic of Panama during studies of avian nesting success. Eight predations were by birds, including two species of toucan and one forest-falcon. Four predations were by two species of snake[...]
Article
From 1936 to 1998 I kept notes on the Riverside Wren (Thryothorus semibadius) in southern Pacific Costa Rica. Early in this interval, the wrens lived chiefly along the shores of wider streams flowing through the forests and around marshy opening[...]
