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• W1998062037 abstract "Although Red-tailed Hawks (Buteo jamaicensis) and American Kestrels (Falco sparverius) are common raptors in the U.S.A., their wintering population abundance and distribution has not been studied recently in Arkansas. We assessed the temporal and spatial variation in population abundance of Red-tailed Hawks and American Kestrels over the winter in northeastern Arkansas. We conducted weekly surveys from an automobile in Craighead and Poinsett counties, Arkansas, October 2012–March 2013. Abundance of Red-tailed Hawks (n = 854 total observations) and American Kestrels (n = 165 total observations) along the transect increased during winter months. The overall abundance indices were 7.05 Red-tailed Hawks per 10 km (highest ever recorded) and 1.36 American Kestrels per 10 km. We found no significant differences in the utilization of the various cover types (i.e., short rice stubble, soybean stubble, and fallow areas/roadsides) for either species. However, both species differed in their use of perch types (i.e., utility poles, utility crossbeams, utility wires, trees, and other [such as ground, signs, or farming equipment]). Red-tailed Hawks perched on trees and crossbeams significantly more than on other perches. American Kestrels used utility wires as perches significantly more than any of the other perch types. We concluded that northeastern Arkansas is an important wintering area for migrating Red-tailed Hawks and American Kestrels, despite the large-scale agricultural fields present year-round in the landscape.Aunque Buteo jamaicensis y Falco sparverius son rapaces comunes en los EEUU, la abundancia y la distribución de sus poblaciones de invernada no han sido estudiadas recientemente en Arkansas. Evaluamos la variación temporal y espacial de la abundancia poblacional de B. jamaicensis y F. sparverius a lo largo del invierno en el noreste de Arkansas. Llevamos a cabo censos semanales desde un automóvil en los condados de Craighead y Poinsett, Arkansas, desde octubre del 2012 hasta marzo del 2013. Las abundancias de B. jamaicensis (n = 854 observaciones totales) y de F. sparverius (n = 165 observaciones totales) a lo largo de la transecta aumentaron durante los meses de invierno. Los índices de abundancia globales fueron 7.05 individuos de B. jamaicensis cada 10 km (el más alto jamás registrado) y 1.36 individuos de F. sparverius cada 10 km. No encontramos diferencias significativas en la utilización de los diferentes tipos de cobertura (i.e., rastrojos cortos de arroz, rastrojos de soya, áreas/banquinas sin cultivar) para ninguna de las especies. Sin embargo, ambas especies difirieron en su utilización de los tipos de percha (i.e., postes de cableado, travesaños de servicios, cables de servicio, árboles y otros [tales como suelo, señales o equipamiento de granjas]). B. jamaicensis perchó en árboles y travesaños significativamente más que en otras perchas. F. sparverius utilizó cables de servicios como percha significativamente más que otros tipos de percha. Concluimos que el noreste de Arkansas es un área importante de invernada para los individuos migrantes de B. jamaicensis y F. sparverius, a pesar de los campos agrícolas de gran escala presentes todo el año en el paisaje." @default.
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• W1998062037 date "2014-09-01" @default.
• W1998062037 modified "2023-09-23" @default.
• W1998062037 title "Abundance and Distribution of Overwintering Red-tailed Hawks and American Kestrels in an Agricultural Landscape in Northeastern Arkansas" @default.
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• W1998062037 doi "https://doi.org/10.3356/jrr-13-54.1" @default.
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