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Natuna Serpent Eagle
Spilornis natunensis

Status: Data Deficient

Population Trend: Unknown.

Other Names: Natuna Serpent-eagle.

Spilornis natunensis
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Distribution: Indomalayan. Endemic to Natuna Besar, north of western BORNEO, and Belitung, between southwest BORNEO and SUMATRA, INDONESIA.

Subspecies: Monotypic.

Taxonomy: This form has been regarded as a subspecies of the widespread Crested Serpent Eagle (S. cheela, by most authors (Stresemann and Amadon 1979, Amadon and Bull 1989, Sibley and Monroe 1990, del Hoyo et al. 1994), but Ferguson-Lees and Christie (2001) treated it as a full species. They are followed here, pending a molecular genetics study of the entire genus Spilornis and because the different insular populations formerly assigned to S. cheela may have distinct, pressing conservation problems that might be overlooked if they are treated as subspecies.

Movements: Probably sedentary.

Habitat and Habits: Occurs on wooded hills and perhaps also in semi-open country, most of which is below 50 m on these islands (Ferguson-Lees and Christie 2001).

Food and Feeding Behavior: Probably feeds on snakes and lizards (Ferguson-Lees and Christie 2001).

Breeding: No information.

Conservation: Probably at some threat from habitat loss. This species is not classified by BirdLife International, who regard it as a subspecies of S. cheela.

Population Estimates: Ferguson-Lees and Christie (2001) placed the global population (defined as the numbers of adults and immatures at the start of the breeding season) in the hundreds, based on the areal extent of its range; there are no actual population data.

Important References: 
Clark, W.S. 1994. Crested Serpent-eagle. P. 133 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.

Last modified: 6/11/2010

Recommended Citation: Global Raptor Information Network. 2020. Species account: Natuna Serpent Eagle Spilornis natunensis. Downloaded from http://www.globalraptors.org on 25 Sep. 2020

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