The Walden's hornbill (Aceros waldeni), also known as the Visayan wrinkled hornbill, rufous-headed hornbill or writhed-billed hornbill, is a critically endangered species of hornbill living in the rainforests on the islands of Negros and Panay in the Philippines.
This colourful and distinctive bird is the World’s second most endangered hornbill. Like most hornbills it possesses a bony ‘casque’, which protrudes from the top of its bill. In the Rufous-headed Hornbill this structure is red-orange and has a wrinkled appearance. Originally found on the three islands of Negros, Panay and Guimaras, it is now locally extinct from the latter due to severe deforestation. Hunting and nest poaching confound this.