Hawks and Eagles (Accipitridae)
Crane Hawk (Geranospiza caerulescens) - HBW 2, p. 168
French: Buse échasse
German: Sperberweihe
Spanish: Azor Zancón
Other common names: Blackish Crane hawk (nigra); Grey Crane hawk (caerulescens); Banded Crane hawk (gracilis)
Taxonomy: Sparvius caerulescens Vieillot, 1817, Cayenne.
Genus Ischnosceles is best regarded as forgotten name. Relation of genus unclear; probably allied to Neotropical sub buteonines, rather than Afrotropical Polyboroides. Substantial geographical variation, with three well defined groups, perhaps approaching separate species status: nigra group, including races livens and balzarensis; caerulescens group; and gracilis group, including race flexipes. However, extensive intergradation between nigra group and caerulescens. At other extreme, some authorities recognize only two or .. View all taxonomy...
Taxonomy: Sparvius caerulescens Vieillot, 1817, Cayenne.
Genus Ischnosceles is best regarded as forgotten name. Relation of genus unclear; probably allied to Neotropical sub buteonines, rather than Afrotropical Polyboroides. Substantial geographical variation, with three well defined groups, perhaps approaching separate species status: nigra group, including races livens and balzarensis; caerulescens group; and gracilis group, including race flexipes. However, extensive intergradation between nigra group and caerulescens. At other extreme, some authorities recognize only two or three races. Six subspecies normally recognized.
Genus Ischnosceles is best regarded as forgotten name. Relation of genus unclear; probably allied to Neotropical sub buteonines, rather than Afrotropical Polyboroides. Substantial geographical variation, with three well defined groups, perhaps approaching separate species status: nigra group, including races livens and balzarensis; caerulescens group; and gracilis group, including race flexipes. However, extensive intergradation between nigra group and caerulescens. At other extreme, some authorities recognize only two or three races. Six subspecies normally recognized.
Subspecies and Distribution:
- livens Bangs & Penard, 1921 - NW Mexico.
- nigra (Du Bus de Gisignies, 1847) - N Mexico (Sinaloa and Tamaulipas) S to zone of Panama Canal.
- balzarensis W. L. Sclater, 1918 - Panama E of canal zone on Pacific slope to W Colombia, W Ecuador and NW Peru (Lambayeque).
- livens Bangs & Penard, 1921 - NW Mexico.
- nigra (Du Bus de Gisignies, 1847) - N Mexico (Sinaloa and Tamaulipas) S to zone of Panama Canal.
- balzarensis W. L. Sclater, 1918 - Panama E of canal zone on Pacific slope to W Colombia, W Ecuador and NW Peru (Lambayeque).
- caerulescens (Vieillot, 1817) - E slope of Colombia and Ecuador to the Guianas and Amazonian Peru and Brazil.
- gracilis (Temminck, 1821) - NE Brazil, from Maranhão, Ceará and Piauí to C Goiás and Bahia.
- flexipes Peters, 1935 - S Brazil (Minas Gerais, S Goiás and Mato Grosso) and Bolivia through Chaco of Paraguay, to NC Argentina (S to La Rioja, Córdoba and Buenos Aires) and Uruguay.
- Least Concern Enlarge map
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Crane hawk, close-up frontal view of head and body of a bird perched in a tree. Locality Pantanal, Mato Grosso State, Brazil (ssp flexipes)
Mark Andrews 9 September 2010 50 weeks ago 36 sec 4.4 -
A bird perched in a dead tree and then flying away, showing the wing patches typical of the species Locality Pantanal, Mato Grosso State, Brazil (ssp flexipes)
Josep del Hoyo 15 June 2001 4 years ago 38 sec 4 -
A bird perched in a low tree at the forest edge. Locality Apoera, Sipaliwini District, Suriname (ssp caerulescens)
Pieter de Groot Boersma 5 May 2011 21 weeks ago 26 sec 3.7 -
A bird perched on a fence post Locality Hato Piñero, Cojedes State, Venezuela (ssp caerulescens)
Keith Blomerley 27 February 2006 5 years ago 16 sec 3.6 -
One bird looking for preys on the fence posts. Locality Quixadá, Ceará State, Brazil (ssp gracilis)
Ciro Albano 12 January 2010 2 years ago 1 min 11 sec 3 -
A bird circleing the sky. Locality Bahia State, Brazil
Yoel Jimenez 19 November 2006 2 years ago 26 sec 3
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Crane Hawk near Chino on the otawayoo river about 200 km from Iquitos, image where taken from a boat.
Locality Loreto Department, Peru
Lior Kislev 1 February 2010 1 year ago 4 -
Perched bird
Locality Hato Piñero, Cojedes State, Venezuela
Chris and Megan Perkins 28 November 2008 3 years ago 3.9 -
Perched on a tree directly above photographer
Locality Calakmul, Campeche State, Yucatán Peninsula, Mexico (Southern) (Monotypic species)
rchavezdm 1 December 2011 6 weeks ago 3.6 -
Perched bird on a dead tree. Forest clearing
Locality Calakmul, Campeche State, Yucatán Peninsula, Mexico (Southern)
rchavezdm 1 December 2011 6 weeks ago 3.6 -
Juvenil
Locality Hacienda La Zuliana, Campo Boscán, Maracaibo, Zulia State, Venezuela
kperezleon 26 April 2009 2 years ago 3.2 -
Perched in a branch
Locality Hacienda La Zuliana, Campo Boscán, Maracaibo, Zulia State, Venezuela
kperezleon 10 April 2011 42 weeks ago 3
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two birds in flight. Locality Serra de Baturité, Ceará State, Brazil
(ssp gracilis)
Ciro Albano 15 April 2006 2 years ago 4
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