An Analysis of the Stomach Contents of Some Cooper's Hawks (Accipiter cooperii)

The Auk ◽  
1966 ◽  
Vol 83 (2) ◽  
pp. 308-308 ◽  
Author(s):  
Stewart Duncan
Keyword(s):  
Stomach Contents ◽  
Accipiter Cooperii ◽  
Cooper's Hawks

Polygyny Leads to Disproportionate Recruitment in Urban Cooper’s Hawks (Accipiter cooperii)

2015 ◽  
Vol 49 (3) ◽  
pp. 344 ◽  
Author(s):  
Timothy G. Driscoll ◽  
Robert N. Rosenfield
Keyword(s):  
Accipiter Cooperii ◽  
Cooper's Hawks

scholarly journals Variation of West Nile Virus Antibody Prevalence in Migrating and Wintering Hawks in Central California

The Condor ◽  
2006 ◽  
Vol 108 (2) ◽  
pp. 435-439
Author(s):  
Joshua Hull ◽  
Holly Ernest ◽  
Joshua Hull ◽  
Angus Hull ◽  
William Reisen ◽  
...  
Keyword(s):  
West Nile Virus ◽  
Central Valley ◽  
West Nile ◽  
Central California ◽  
Buteo Jamaicensis ◽  
Accipiter Cooperii ◽  
Cell Counts ◽  
Wing Chord ◽  
White Blood Cell Counts ◽  
Cooper's Hawks

Abstract To assess the extent of West Nile virus (WNV) exposure of migrating (Marin Headlands) and wintering (Central Valley) hawks in California, plasma from 271 Red-tailed Hawks (Buteo jamaicensis), 19 Red-shouldered Hawks (B. lineatus), and 30 Cooper's Hawks (Accipiter cooperii) was tested for WNV antibodies during the winter of 2004–2005. WNV antibodies were found in 5% of migrating and 15% of wintering Red-tailed Hawks, 20% of migrating and 58% of wintering Red-shouldered Hawks, and 13% of migrating Cooper's Hawks. No individuals demonstrated visible signs of WNV illness. Red-tailed Hawks that tested positive for WNV antibodies displayed no difference from Red-tailed Hawks without WNV antibodies in weight to wing chord ratio or white blood cell counts. In the Central Valley, WNV antibodies were significantly more prevalent in Red-shouldered Hawks than in Red-tailed Hawks. Significantly more Red-tailed Hawks sampled on wintering grounds tested positive for WNV antibodies than Red-tailed Hawks sampled during migration.

scholarly journals COLUMBID HERPESVIRUS-1 IN TWO COOPER'S HAWKS (ACCIPITER COOPERII) WITH FATAL INCLUSION BODY DISEASE

2008 ◽  
Vol 44 (3) ◽  
pp. 622-628 ◽  
Author(s):  
Marie E. Pinkerton ◽  
James F. X. Wellehan ◽  
April J. Johnson ◽  
April J. Childress ◽  
Scott D. Fitzgerald ◽  
...  
Keyword(s):  
Inclusion Body ◽  
Accipiter Cooperii ◽  
Inclusion Body Disease ◽  
Herpesvirus 1 ◽  
Cooper's Hawks

scholarly journals Age-related variation in the oral microbiome of urban Cooper’s hawks (Accipiter cooperii)

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Michael J. Taylor ◽  
R. William Mannan ◽  
Jana M. U’Ren ◽  
Nicholas P. Garber ◽  
Rachel E. Gallery ◽  
...  
Keyword(s):  
Oral Microbiome ◽  
Accipiter Cooperii ◽  
Related Variation ◽  
Age Related ◽  
Cooper's Hawks

scholarly journals Using Hydrogen Isotope Geochemistry to Estimate the Natal Latitudes of Immature Cooper's Hawks Migrating Through the Florida Keys

The Condor ◽  
2001 ◽  
Vol 103 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Timothy D. Meehan ◽  
Casey A. Lott ◽  
Zachary D. Sharp ◽  
Ruth B. Smith ◽  
Robert N. Rosenfield ◽  
...  
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Geochemistry ◽  
Florida Keys ◽  
Accipiter Cooperii ◽  
New Information ◽  
Stable Hydrogen Isotope ◽  
Males And Females ◽  
Hydrogen Isotope Ratios ◽  
The Relationship ◽  
Cooper's Hawks

Abstract We constructed a regression model for the relationship between stable-hydrogen isotope ratios in immature Cooper's Hawk (Accipiter cooperii) feathers (δDf) and precipitation in areas where feathers were grown (δDp) across much of the latitudinal and longitudinal extent of the species' breeding range. We used our model to estimate δDp values from δDf values of immature Cooper's Hawks captured during migration in the Florida Keys. We compared these estimated δDp values to a published map of δDp values of North American precipitation to learn the latitudinal origins of migrants. We reviewed previous migration banding studies to estimate the longitudinal range of migrants. Our analysis suggested that most of the immature Cooper's Hawks migrating through the Keys originated in natal areas in the Mid-Atlantic and Southeast regions of the continent. We found no difference in the passage date of northern and southern birds or in the latitudinal origins of males and females. This new information will aid in the interpretation of population trends generated from the ongoing migration count in the Keys.

scholarly journals Riding the storm out: select demographics of a breeding population of Cooper’s hawks (Accipiter cooperii) following a severe spring snowstorm

2019 ◽  
Vol 13 (1) ◽  
pp. 121-126
Author(s):  
Robert N. Rosenfield
Keyword(s):  
Climate Change ◽  
Nest Success ◽  
Breeding Population ◽  
Tree Canopy ◽  
Change Models ◽  
Accipiter Cooperii ◽  
Study Population ◽  
Average Brood ◽  
Demographic Responses ◽  
Cooper's Hawks

Abstract The demographic responses to severe weather by top-level predators, including birds of prey, are underreported and/or unknown. Severe storms are predicted by climate change models to increase globally and in frequency into the 22nd century. In April 2018, a population of breeding Cooper’s hawks (Accipiter cooperii) in central Wisconsin, USA, experienced three days of heavy snowfall in the most severe storm, in pre-incubation-stage, for 39 years (1980–2018). Here I report select demographic outcomes of this nesting population following this intense weather. The median hatching date of 10 June in 2018 was the sixth latest such metric in those 39 years (and the latest in 22 years since 1996) for this population, which has advanced its breeding schedule about 1.3 days/decade due to climate change or warming. Survival of a total of 16 color-marked breeding adults, 15 males and 1 female, observed pre-storm in the nesting areas, was 100% up through the late nestling stage in the same nesting areas where these birds were initially detected in 2018. Average clutch size (4.4 eggs/nest) and average brood size (4.0 young/nest) were similar to the overall average annual metrics of these demographics for this population in the earlier 38 study years. Nest success, whereby 95% of 21 nests with eggs produced advanced-aged young, was higher in 2018 than the overall average of 77% nest success rate during the earlier years. The later timing of hatching in 2018, likely due to the severe spring snowstorm, appeared to have no deleterious effects either on survival of the breeding adults or on the reproductive output of this healthy study population. Tree-canopy prey may have served as important alternative food for this typically ground-foraging raptor in 2018.

Microsatellite markers suggest high genetic diversity in an urban population of Cooper’s hawks (Accipiter cooperii)

2016 ◽  
Vol 95 (S1) ◽  
pp. 19-24 ◽  
Author(s):  
FRANCISCO MORINHA ◽  
PEDRO SILVEIRA RAMOS ◽  
SÓNIA GOMES ◽  
ROBERT WILLIAM MANNAN ◽  
HENRIQUE GUEDES-PINTO ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Urban Population ◽  
High Genetic Diversity ◽  
Accipiter Cooperii ◽  
Cooper's Hawks
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