The rarest and most endangered hornbill species in the world is the Sulu hornbill (Anthracoceros montani). According to a 2018 Mongabay article written by Bee Choo Strange, the species, endemic to the Philippines, was discovered in 1880. Once a thriving population, there are now approximately only 40 of the Sulu hornbill species alive. The first hornbill extinction recorded was in the Philippines, making conservationists determined to save the remaining hornbills in the country. Hornbill species are most threatened by habitat loss due to deforestation and mining, based on a 2018 report by Rouchelle Dinglasan for GMA News Online.