Scientific Name: Accipiter nisus
Malay Name: Helang-Sewah Erasia
Chinese Name: 雀鹰
Found throughout much of the Palearctic from northwestern Africa, Europe, Central Asia, northern Indian subcontinent, northern China to Siberia with some northern populations winter south to northern Africa, Middle East, Indian subcontinent, southern China, Indochina and the Thai-Malay Peninsula
Polytypic. Subspecies are: nisus, nisosimilis, dementjevi, melaschistos, wolterstorffi, punicus, granti
Local Subspecies: nisosimilis
Size: 28-38 cm
Identification: Male has slaty-grey upperparts, faint narriow supercilium, orange-rufous head-sides, faint orange-rufous bars on whitish underparts and long slender tail. Female resembles male but much bigger and has brown-tinged upperparts, more prominent whitish supercilium and no orange-rufous head-sides. Juvenile can be best separated from other accipiter species from the relatively larger size, rufous-chestnut to blackish barred underparts and whitish supercilium. Both adult and juvenile appears long-winged and long-tailed in flight, showing six prominent fingers.
Habitat: Wooded and open areas.
Ecology/Behaviour: The female is up to 25% larger than the male – one of the largest differences between the sexes in any bird species.
Local Status: Very rare migrant
Conservation Status: Least Concern (IUCN 3.1)
Location: There were only 3 confirmed records for Singapore. The first was a juvenile photographed at Tuas on 14 November 2010. The second and third were photographed in flight at Henderson Waves Bridge on 17 November 2016 and 26 November 2017 respectively.
Craig Robson (2011) A Field Guide to the Birds of South-East Asia
Allen Jeyarajasingam & Alan Pearson (2012) A Field Guide to the Birds of Peninsular Malaysia and Singapore
Robert DeCandido et al (2014) “Flight identification and plumage descriptions of six Accipiter species on southbound migration at Khao Dinsor, Chumphon province, Thailand” in BirdingASIA 21