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Eastern Marsh Harrier
Circus spilonotus

Status: Lower risk

Population Trend: Unknown.

Other Names: Eastern Marsh-harrier.

Circus spilonotus
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Distribution: Palearctic. Southeastern SIBERIA, Russian Far East, and MONGOLIA to USSURILAND, SAKAHLIN ISLAND, northeastern CHINA, and northern JAPAN; winters from Southeast Asia, southern CHINA, southern JAPAN, and KOREA to INDONESIA, PHILIPPINES, and BORNEO. more....

Subspecies: Monotypic.

Taxonomy: Formerly considered to be a subspecies of C. aeruginosus (Voous 1977, Stepanyan 1990), and there is some hybridization where the two meet in central Siberia (Voous 1965). However, they are highly distinct morphologically (Amadon 1978). The form spilothorax, formerly regarded as a subspecies of spilonotus, was treated as a full species by Simmons (2000), who is followed here. Wink and Sauer-Gürth (2004) confirmed that C. aeruginosus, C. ranivorus, C. approximans, C. maillardi, C. macrosceles, and this species form a monophyletic group, based on evidence from the mitochondrial cytochrome b gene.

Movements: Partial migrant (Bildstein 2006). more....

Habitat and Habits: Soars over marshes, ponds, reedbeds, mangroves, intertidal mudflats, and other watered areas. Roosts in flocks in winter (Sheldon et al. 2001). more....

Food and Feeding Behavior: Preys on small mammals, birds, frogs, and insects (Kennedy et al. 2000, Sheldon et al. 2001). Also feeds on carrion. more....

Conservation: Widespread and farily common in eastern Asia. Classified globally as a species of "Least Concern" by BirdLife International (2009). more....

Important References: 
Brazil, M. 2009. Birds of East Asia: China, Taiwan, Korea, Japan, and
  Russia. Princeton University Press, Princeton, NJ.
Ferguson-Lees, J., and D.A. Christie. 2001. Raptors of the world. Houghton
  Mifflin, Boston, MA.
Orta, J. 1994. Eastern Marsh-harrier. Pp. 137-138 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.
Simmons, R. 2000. Harriers of the world: their behaviour and ecology.
  Oxford University Press, Oxford, UK.

Saharudin, Muhd Hakim
Scott, Don

Last modified: 5/20/2010

Recommended Citation: Global Raptor Information Network. 2022. Species account: Eastern Marsh Harrier Circus spilonotus. Downloaded from http://www.globalraptors.org on 23 Jan. 2022

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