What is this hawk with "spotted" back?
https://www.inaturalist.org/observations/299498977
(also some about Circus evolution/migration/ecology / how ageing and sexing of Pernis ptilorhynchus was established / do juvenile birds migrate earlier?).
also https://www.inaturalist.org/observations/303335718
(ageing of Circus spilonotus, life-history traits)
https://www.inaturalist.org/observations/322239168
(difference in "continental" and breeding population in Japanese mainland / history of the Japanese population / taxonomy)
https://www.inaturalist.org/observations/144447933
(Sri Lanka. The wintering range of ssp. orientalis may be too narrow in modern checklists?)
https://www.inaturalist.org/observations/87838730
(Strange individual with long, pointed primaries in India)
https://www.inaturalist.org/observations/286991851
https://www.inaturalist.org/observations/263036227
(Former: Nisaetus sp. resembling Pernis, latter the reverse).
https://www.inaturalist.org/observations/258826769
(display flight in Aviceda in relation to Pernis)
https://www.inaturalist.org/observations/208700518
(display and voice of Circus melanoleucos, similarity with Vanellus vanellus, evolution of calls in relation to Paridae)
https://www.inaturalist.org/observations/295893525
(etymology of "Bald Eagle" / Bald Eagle in Kuril - Hokkaido region)
Topic in frugivory (?) in Nisaetus nipalensis:
https://www.inaturalist.org/observations/18992572
(also frugivory in raptors in general / avian taste system / chemoreceptor gene repertoire, including the sense of smell / raptor evolution and possible relation to evolution of immunity in bats or our existence?? / animal communication and language)
https://www.inaturalist.org/observations/264805048
(what is Astur gentilis buteoides and genetic relationship / potential role of pale-colored individuals / intraspecific brood parasitism in Astur cooperii / frequent copulation in raptors)