A Record of Tree-Nesting Prairie Falcons in Wyoming

MacLaren, Patricia A.; Runde, Douglas E.

doi:10.2307/1366835

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…Nest cliff lengths and heights range from 5 to 2400 m and from 3 to 140 m, respectively (Skinner 1961, Leedy 1972, Denton 1975, Williams 1981, Allen 1987b. Rarely, Prairie Falcons also may nest in trees or on transmission line towers in the abandoned nests of other large birds, including Common Raven (Corvus corax) and Black-billed Magpie (Pica hudsonia) (Skinner 1961;MacLaren et al 1984MacLaren et al , 1988Roppe et al 1989;Bunnell et al 1997). In the Snake River Birds of Prey Area (SRBPA) in southwestern Idaho, the amount of cliff area present per 10-km stretch of survey route explained 91% of the variation in nesting density (Steenhof et al 1999), indicating that Prairie Falcons may be limited by the availability of nesting substrates.…”

Section: Suitable Habitatmentioning

confidence: 99%

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Effects of management practices on grassland birds: Prairie Falcon

DeLong¹,

Steenhof²

2004

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This report is one in a series of literature syntheses on North American grassland birds. The need for these reports was identified by the Prairie Pothole Joint Venture (PPJV), a part of the North American Waterfowl Management Plan. The PPJV adopted a goal to stabilize or increase populations of declining grasslandand wetland-associated wildlife species in the Prairie Pothole Region. To further that objective, it is essential to understand the habitat needs of birds other than waterfowl, and how management practices affect their habitats. The focus of these reports is on management of breeding habitat, particularly in the northern Great Plains.

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Section: Suitable Habitatmentioning

confidence: 99%

“…Nested on chalk bluffs MacLaren et al 1984MacLaren et al , 1988 Wyoming Grassland, shrubsteppe, woodland…”

Section: Management Recommendationsmentioning

confidence: 99%

Effects of management practices on grassland birds: Prairie Falcon

DeLong¹,

Steenhof²

2004

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“…the sites used in northeastern Wyoming (Phillips andBeske 1990, Phillips et al 1990), western North Dakota , and other western states (Enderson 1964, Runde andAnderson 1986). Nesting has occurred in old magpie nests (MacLaren et al 1984) and on transmission towers (Roppe et al 1989). Nest exposures tend to be southerly (Runde and Anderson 1986); 89% of the nests reported by Becker (1978) in Carter County, Montana faced south to west.…”

Section: Prairie Falcon {Falco Mexicanus)mentioning

confidence: 99%

“…Ferruginous Hawks are generally considered the raptor most sensitive to nest disturbance (Fyfe and Olendorff 1 976, Harmata 1991, Olendorff 1 993), however Northern Goshawks are sensitive to low levels of canopy removal (Block et al 1994, Crocker-Bedford 1990, Reynolds 1983 and may be precluded from nesting if dense stands of conifers are no longer available. Old Black-billed Magpie nests are used extensively by Merlins for nesting (Sieg and Becker 1990), and have been used as nest sites by other falcon species as well (Becker 1987, MacLaren et al 1984. The importance of old corvid nests for a variety of diurnal and nocturnal raptor species needs to be quantified, but the use of "artificial magpie nests" might help mitigate disturbances at traditional nesting areas.…”

Section: Management Considerationsmentioning

confidence: 99%

Cliff-nesting raptor survey of the Sioux District, Custer National Forest : 1994

Dueholm¹,

Hendricks²

1995

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Field surveys of potential cliff nesting-sites for diurnal raptors were conducted in June and early July 1994 in the Chalk Buttes, the Ekalaka Hills and the southern half of the Long Pines of the Sioux District, Custer National Forest, Montana. All surveys were conducted on foot. About 300 separate sites were surveyed, falling into roughly 42 concentrations of cliffs and/or outcrops. Only three active Prairie Falcon nest sites and one probable Merlin nest site were identified. Because of time limitations of the 1994 field survey, it is anticipated that a comprehensive survey of greater duration of both the Montana and South Dakota portions of the Sioux District will identify additional nests not discovered in this preliminary effort. Nevertheless, the few nesting pairs detected are cause for concern, especially when contrasted with historical nesting data, and indicate the need for a more thorough field effort. Published literature and unpublished nest records indicate that significant numbers of Prairie Falcons, Merlins, and Golden Eagles have nested on and near Custer National Forest lands in recent decades. Ferruginous and Swainson's Hawks nest mostly off of the Custer National Forest. The Northern Goshawk is also a potential breeding species in low densities in mature pine stands, and future raptor inventory efforts should include surveys of its potential nesting habitat; one adult was seen in the Long Pines in June during the survey.

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