Dinagat, Siargao, Camiguin and Mindanao (southern Philippines).
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is unknown (2010) and decreasing.
Status NT
Forest clearance for agriculture and logging, hunting and trapping for trade, are the main threats.
For more information see BirdLife International Species Factsheet.
Writhed Hornbill (Rhabdotorrhinus leucocephalus) [XC79262]
by Ross Gallardy from Sitio Siete, South Cotabato Province, Mindanao, Philippines (call)
Writhed Hornbill (Rhabdotorrhinus leucocephalus) [XC67500]
by Desmond Allen from Mindanao; Zamboanga, Pasonanca Watershed Reserve, Cabonegro, Philippines (call)
Subspecies
Sometimes placed in genus Rhyticeros. May form a superspecies with Knobbed Hornbill (Rhyticeros cassidix), Wrinkled Hornbill (Rhabdotorrhinus corrugatus) and Rufous-headed Hornbill (Rhabdotorrhinus waldeni). Often considered conspecific with Rufous-headed Hornbill (Rhabdotorrhinus waldeni), but differs in plumage and bare-part colours, and in degree of sexual dimorphism in colour of facial skin. In the past, was sometimes treated as conspecific with Wrinkled Hornbill (Rhabdotorrhinus corrugatus), but differs markedly in several aspects of morphology.
BirdLife International Species Factsheet