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White-rumped Hawk
Parabuteo leucorrhous

Status: Lower risk

Population Trend: Unknown.

Other Names: Percnohierax leucorrhous, Asturina leucorrhoa, Buteo leucorrhous, Rufous-thighed Hawk.


Parabuteo leucorrhous
click to enlarge
Distribution: Neotropical.  Western COLOMBIA and VENEZUELA south through ECUADOR and PERU to northwestern BOLIVIA (Cochabamba, La Paz); disjunct population in southern BRAZIL (north to Minas Gerais), PARAGUAY, western URUGUAY, and northern ARGENTINA. more....

Subspecies: Monotypic.

Taxonomy: Formerly placed in the genus Buteo or Rupornis (Pinto 1938), but recent molecular studies by Riesing et al. (2003) showed that this species is quite distinct and should be maintained in a separate genus, Percnohierax. Based on molecular sequences of both mitochondrial and nuclear genes, Raposo do Amaral (2006) and Lerner et al. (2008) found that this genus may be a sister taxon to Parabuteo unicinctus (Harris's Hawk). Pinto (1938) placed this species in the genus Rupornis with the Roadside Hawk. It is possible that the two disjunct populations of the White-rumped Hawk represent different subspecies, or even full species.

Movements: Irruptive or local migrant (Bildstein 2006).

Habitat and Habits: Mostly middle elevations and lower montane areas. Humid forest and forest edges, especially near clearings and broken forest on hillsides. Soars frequently over forest, singly or in pairs, especially in the morning, and may perch on exposed branches in canopy or lower (Hilty 2003, Hilty and Brown 1986).

Food and Feeding Behavior: Feeds on small mammals (rats), according to Sick (1993).

Breeding: There is remarkably little information on the breeding biology of this species, so details on a nest recently found in the Atlantic Forest of Brazil by Zilio and Mendonça-Lima (2012) were most welcome. They discovered the nest on 2 October 2009 in southern Santa Catarina. The nest was 22 m high in a pine tree in a stand of pines. The nest was cup-shaped and composed to sticks and lined with a few green leaves. It contained two creamy-white eggs measuring 42.64-44.48 x 34.74-34.52 mm and weighing 25-28 g. It was not possible for the authors to make further observations on the nest. Hilty and Brown (1986) mentioned a Colombian nest active in February-March.

Conservation: Status unclear. Despite its extensive range, this species is little studied and appears to be rare or uncommon everywhere. Categorized as "Least Concern" by BirdLife International. more....

Important References: 
Bierregaard, R.O. 1994. White-rumped Hawk. P. 180 in del Hoyo, J., A.
  Elliott, and J. Sargatal (eds). Handbook of birds of the world. Vol. 2. New
  World vultures to guineafowl. Lynx Edicions, Barcelona, Spain.
Ferguson-Lees, J., and D.A. Christie. 2001. Raptors of the world. Houghton
  Mifflin, Boston, MA.
Zilio, F., and A. de Mendonça-Lima. 2012. The White-rumped Hawk (Buteo
  leucorrhous
) in southern Brazil: status, conservation, and first
  description of the nest. Ornitologia Neotropical 23:51-62.
more....

Sites of Interest:
Xeno-canto
Vocalizations.
Aves de Rapina do Brasil
Species account with emphasis on Brazil.

Researchers:
Raposo do Amaral, Fábio

Last modified: 9/3/2015

Recommended Citation: Global Raptor Information Network. 2017. Species account: White-rumped Hawk Parabuteo leucorrhous. Downloaded from http://www.globalraptors.org on 19 Aug. 2017








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