Sex and Age Group Specific Changes in Body Condition of Red-tailed Hawks in Central Nebraska

@inproceedings{Schoenebeck2014SexAA,
  title={Sex and Age Group Specific Changes in Body Condition of Red-tailed Hawks in Central Nebraska},
  author={Casey W. Schoenebeck and M P Turco and Rae M. Fahrlander and Kaitlyn M. Darveau and Thomas L. Freeman},
  year={2014}
}
ABSTRACT The central plains and the Platte River Valley of Nebraska are recognized as important winter habitat for many raptor species, but few studies have evaluated the ecology or physiology of birds of prey wintering in the region. The purpose of our study was to collect morphological data from Red-tailed Hawks (Buteo jamaicensis) occupying the study area during non-breeding months to better understand the sex ratios and potential changes in body condition of raptors in central Nebraska… Expand
1 Citations
Body condition in Snowy Owls wintering on the prairies is greater in females and older individuals and may contribute to sex-biased mortality
TLDR
The effects of age and sex on body condition and various sources of mortality in wintering Snowy Owls on the Canadian prairies showed that adults were heavier than juveniles for a given body size and carried more fat reserves. Expand

References

SHOWING 1-10 OF 29 REFERENCES
AGE AND SEX DIFFERENCES IN THE TIMING OF FALL MIGRATION OF HAWKS AND FALCONS
TLDR
It is suggested that it is adaptive for adults and males to remain on breeding territories as long as possible so adults might then migrate more rapidly than juveniles. Expand
Red-Tailed Hawk Populations and Ecology in East-Central Wisconsin
TLDR
This paper reports on a study of Red-tailed Hawk populations, reproductive success, and food habits in relation to Ringnecked Pheasants in east-central Wisconsin. Expand
Sex determination of Red‐tailed Hawks (Buteo jamaicensis calurus) using DNA analysis and morphometrics
TLDR
The ability to determine the sex of western Red-tailed Hawks using morphological measurements will be useful to investigators examining possible intra- or intersexual differences and to investigadores interesados in determinar posibles diferencias intra e intersexuales. Expand
A mechanism of sexual segregation by habitat in American Kestrels (Falco sparverius) wintering in south-central Florida
TLDR
Because there was no evidence of male submissiveness on the wintering grounds, the female-dominance hypothesis is not a plausible explanation for sexual segregation by habitat in wintering kestrels. Expand
Sex-related Differences in Habitat Use in Wintering American Kestrels
TLDR
The hypothesis that males and female kestrels prefer open areas as wintering habitat is supported, suggesting that males may be constrained to winter in areas with lower overall foraging opportunities and possibly higher predation risk than areas used by females. Expand
Differential Migration between Discrete Populations of Juvenile Red-Tailed Hawks (Buteo jamaicensis)
TLDR
Using 24 years of banding data, 15 years of migration counts, and molecular genetic data from 17 microsatellite loci to describe the migration phenology, direction, and population connectivity of Red-tailed Hawks migrating through the Marin Peninsula, California offers an example of how traditional population-monitoring methods can be combined with molecular genetic markers. Expand
SPECIES AND ABUNDANCE OF DIURNAL RAPTORS IN THE PANHANDLE OF NEBRASKA
R ECENT evidence of population declines for several species of raptors has been a subject of some concern both nationally and internationally. Although raptors are the most conspicuous birds in ourExpand
American kestrel sex ratios and habitat separation
UNBALANCED sex ratios of wintering American Kestrels (Falco sparverius) have been reported by many authors (Broun 1949, Roest 1957, Willoughby and Cade 1964, Heintzelman and Nagy 1968, Koplin 1973,Expand
Winter raptor composition, abundance and distribution around urban Spokane, eastern Washington
As is true of many urban areas, Spokane has little information on winter raptor populations. Even outside urban areas, many authors have pointed to the lack of available data on wintering raptorExpand
Landscape characteristics influence morphological and genetic differentiation in a widespread raptor (Buteo jamaicensis)
TLDR
Habitat preferences and regionally disparate population densities may play a role in shaping genetic structure in vagile avian taxa, and a pattern of isolation by distance among western breeding sites around the Sierra Nevada is identified. Expand
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