altitudinal limit. The lowland forest that does remain is highly fragmented and is still under threat. Kaingin or Slash-and-burn cultivation, occasional selective logging and rattan collection threaten the forest fragments that still support the species. Dynamite blasting for marble is an additional threat to forest at Puerto Galera. Hunting and poaching are also considered as significant threats. It occurs in a few protected areas including Mt. Iglit-Baco National Park, where it shares habitat with the iconic Tamaraw and in Mt. Siburan in Sablayan which has been declared an Important Bird Area. Conservation actions proposed include more surveys in areas where they have been reported to better understand the population, create formal protection in other sites where they are found in Malpalon, Puerto Galera and Manamlay Lake. References 3. ^Dutson, Guy C.L. Evans, Tom D. Brooks, Thomas M. Asane, Desiderio C. Timmins, Robert J. Toledo, Angela. (1992). Conservation status of birds on Mindoro, Philippines. Bird Conservation International, (2) 4, 303–325. External links BirdLife Species Factsheet. https://www.cambridge.org/core/services/aop-cambridge-core/content/view/91C5D2394C93C7C605FE69B97552873E/S0959270900002513a.pdf/conservation_status_of_birds_on_mindoro_philippines.pdf Mindoro hornbill Birds of Mindoro Mindoro hornbill Mindoro hornbill Taxonomy articles created by Polbot Birds of the Philippines Endangered species