raptor migration in an oceanic flyway: wind and geography shape the migratory route of grey-faced buzzards in east asia.flapping flight is relatively costly for soaring birds such as raptors. to avoid costly flight, migrating raptors generally avoid flying over water. as a result, all but one of the global raptor migration flyways are largely over land. the east asian oceanic flyway for raptors is the exception. raptor species using this flyway migrate by island-hopping, flying over open ocean for distances of up to 300‚ÄČkm between islands. we used satellite telemetry data for grey-faced buzzards butastur indicus, ...201829657765
analysis of the genetic diversity and structure of the grey-faced buzzard (butastur indicus) in japan, based on mtdna.the grey-faced buzzard (butastur indicus) is a raptor that inhabits east asia, including japan. because the number of individuals has decreased by 75% over the last 40 years, this species is classified as vulnerable (vu) in japan. in the present study, wesought to reveal the genetic structure of the japanese grey-faced buzzard population at several breeding sites, and to assess the levels of genetic diversity within the japanese population. we sequenced 555 bp of the mitochondrial dna of 96 indi ...201931116534
the feather structure of oriental honey buzzards (pernis ptilorhynchus) and other hawk species in relation to their foraging behavior.the basic structure of a bird feather may be adapted to suit a variety of functions on different parts of the body and in different species. in oriental honey buzzards (pernis ptilorhynchus), a species which often preys on the larvae of bees and wasps, it is thought that the bird's integument may provide protection against the stings of these insects. we investigated the structure of oriental honey buzzard feathers from the face, head, and neck using light and scanning electron microscopy. the s ...201627268984
porrocaecum parvum n. sp. and p. reticulatum (linstow, 1899) (nematoda: ascaridoidea) from birds in china.porrocaecum parvum n. sp. is described from the grey-faced buzzard butastur indicus (gmelin) (accipitriformes: accipitridae) in china. the new species differs from its congeners in having well-developed cervical alae, small interlabia and very short intestinal caecum (0.34 mm long, representing 11.9% of oesophageal length) and in the number and arrangement of the caudal papillae (29 pairs in total, arranged as follows: 21 pairs precloacal, single double pair paracloacal and seven pairs postcloac ...201526358073
validation of spilornis cheela hoya taqman probes for potential gender identification of many accipitridae species.the objective of this study was to test the hypothesis that genders of accipitridae species, with the same or similar sequences to our previously proposed spilornis cheela hoya (s. c. hoya) chromo-helicase-dna binding protein (chd)-w-specific and chd-zw-common taqman probes, can be successfully determined. eight species of accipitridae with known genders were collected. after pcr, ta cloning, sequencing, and alignment analyses, sequence length differences of griffiths p2/p8 pcr amplicons between ...201019959218
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