Gray Hawk (Buteo plagiatus)

Bibles, Brent D.; Glinski, Richard L.; Johnson, R. Roy

doi:10.2173/bna.652

Cited by 6 publications

(11 citation statements)

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“…Buteo n. nitidus and B. n. plagiatus have two primary vocalizations, a three-note call used primarily during the breeding season and a single-note alarm call (Bibles et al 2002). There are few recorded examples of the three-note call, so we focused our analysis on the single-note alarm call.…”

Section: Methodsmentioning

confidence: 99%

The Gray Hawk (Buteo Nitidus) is Two Species

Millsap¹,

Seipke²,

Clark³

2011

The Condor

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Section: Methodsmentioning

confidence: 99%

The Gray Hawk (Buteo Nitidus) is Two Species

Millsap¹,

Seipke²,

Clark³

2011

The Condor

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“…The Gray Hawk occurs from southeastern Arizona, southern New Mexico, and southern and western Texas south through Middle America to northwestern Costa Rica (Bibles et al 2002). In the southwestern U.S. and northern Mexico most Gray Hawks are migratory.…”

Section: Guildmentioning

confidence: 99%

“…In contrast, Gray Hawk populations from central Sonora southward are nonmigratory . Wintering individuals are rare within the northern portion of the range, though there are many records at this season for the lower Rio Grande valley in Texas and in southern Arizona (Bibles et al 2002).…”

Section: Guildmentioning

confidence: 99%

“…Historically, they nested in mature woodlands of mesquite, cottonwood (Populus spp. ), and netleaf hackberry (Celtis reticulata) (Bibles et al 2002). Extensive woodcutting and ground-water depletion throughout the southwestern United States beginning in the late 1800s removed much of this habitat.…”

Section: Guildmentioning

confidence: 99%

“…Extensive woodcutting and ground-water depletion throughout the southwestern United States beginning in the late 1800s removed much of this habitat. Destruction of habitat coincided with the species' decline in much of its range in the U.S. (Bibles et al 2002). But since the 1960s its range has expanded north, beginning with the recolonization of the Santa Cruz and San Pedro river valleys of Arizona, continuing into western and southern Texas during the 1970s and 1980s, and reaching southwestern New Mexico during the 1990s (Williams and Krueper 2008).…”

Section: Guildmentioning

confidence: 99%

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Untitled

2016

W. Birds

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Real del Mar, 10 km south of the international border along the coast of Baja California, Mexico, 19 February 2015. This photo of an adult female feeding a fledgling represents the first confirmation of Allen's Hummingbird nesting in Mexico and documents the continuing spread of Selasphorus sasin sedentarius. Formerly confined to the Channel Islands off southern California, this subspecies was discovered nesting on the Palos Verdes Peninsula, Los Angeles County, in 1966 and over the following 50 years has spread nearly throughout the urbanized areas of the coastal slope of southern California and now into Mexico, as reported in this issue of Western Birds (pp. 161-166) by Richard A. Erickson.

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Riparian Conservation Facilitated Expansion of Gray Hawks

2020

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Desert riparian ecosystems are among the most threatened biodiversity hotspots in the United States, and efforts to conserve them have been increasing. In 2010–2011 and 2014–2016, we examined shifts in the distribution, habitat characteristics, diet, nest success, and productivity of the gray hawk (Buteo plagiatus), 25 years after a Riparian National Conservation Area was established along the San Pedro River in Arizona, USA, to determine how the removal of grazing and agriculture may have affected the ecosystem. The gray hawk population increased and expanded from mesquite (Prosopis spp.)‐dominated areas that they historically occupied into areas that were dominated by grassland. In contrast with the 1990s, percent of mesquite cover in pairs' territories did not correlate with their productivity. Gray hawk diets also included more mammals in our study period, particularly in territories with more grassland. We propose that conservation measures created habitat for gray hawks in areas that were previously unsuitable by allowing grasslands to regenerate and become habitat for their prey, and that management strategies in the San Pedro Riparian National Conservation Area could serve as a model for conservation of other desert riparian ecosystems. © 2020 The Wildlife Society.

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Gray Hawk (Buteo plagiatus)

Cited by 6 publications

References 0 publications

The Gray Hawk (Buteo Nitidus) is Two Species

The Gray Hawk (Buteo Nitidus) is Two Species

Untitled

Riparian Conservation Facilitated Expansion of Gray Hawks

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