Crested honey buzzard
|Crested honey buzzard|
The crested honey buzzard (Pernis ptilorhynchus) is a bird of prey in the family Accipitridae which also includes many other diurnal raptors such as kites, eagles and harriers. This species is also known as the Oriental honey buzzard.
Despite its name, this species is not related to Buteo buzzards, and is taxonomically closer to the kites. It appears long-necked with a small head (resembling that of a pigeon), and soars on flat wings. The head lacks a strong superciliary ridge giving it a very un-raptor-like facial appearance. It has a long tail and a short head crest. It is brown above, but not as dark as European honey buzzard, and paler below. There is a dark throat stripe. Unusually for a large bird of prey, the sexes can be distinguished. The male has a blue-grey head, while the female's head is brown. She is slightly larger and darker than the male. The male has a black tail with a white band, whilst the female resembles female honey-buzzard.
It breeds in Asia from central Siberia east to Japan. It is a summer migrant to Siberia, wintering in tropical south east Asia. Elsewhere it is more-or-less resident. It is a specialist feeder, living mainly on the larvae of social bees and wasps, also eating bits of comb and honey; it will take other small insect prey such as cicadas.
The Crested honey buzzard breeds in woodland, and is inconspicuous except in the spring, when the mating display includes wing-clapping. The display of roller-coasting in flight and fluttering wings at the peak of the ascent are characteristic of the genus Pernis.
It is larger and longer winged than its western counterpart, the European honey buzzard, Pernis apivorus.
It has been suggested that the similarity in plumage between juvenile Crested honey buzzard and the Spizaetus hawk-eagles has arisen as a partial protection against predation by larger raptors. The eagles have stronger bills and talons, and are likely to be less vulnerable than the Pernis species.
Similar mimicry is shown by the juveniles of the European honey buzzard, which resembles the common buzzard. Although the northern goshawk is capable of killing both species, it is likely to be more cautious about attacking the better protected Buteo species.
The effects of wind and climate change on migratory route
Crested buzzards that migrate from breeding areas in Japan to wintering areas in South-east Asia fly over the East China Sea. This 700-km non-stop flight over water is possible because during autumn, winds over the sea blow in the same direction as the birds' direction of flight (i.e. wind support) . As climate change affects wind conditions worldwide, the wind support over the East China Sea could be reduced .
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- "Pernis ptilorhynchus (Crested Honey Buzzard)". Integrated Taxonomic Information System. Retrieved 15 May 2016.
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- Nourani, Elham; Yamaguchi, Noriyuki M; Manda, Atsuyoshi; Higuchi, Hiroyoshi (2016). "Wind conditions facilitate the seasonal water-crossing behaviour of Oriental Honey-buzzards Pernis ptilorhynchus over the East China Sea". Ibis. 158 (3): 506-518. doi:10.1111/ibi.12383.
- Nourani, Elham; Yamaguchi, Noriyuki M; Higuchi, Hiroyoshi (2017). "Climate change alters the optimal wind-dependent flight routes of an avian migrant". Proceedings of the Royal Society B. 284 (1854). doi:10.1098/rspb.2017.0149.
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