Aceros waldeni Sharpe, 1877

English: Writhed-billed Hornbill
Français : Calao de Walden
Nederlands: Visayan geribbelde neushoornvogel
Deutsch: Panayhornvogel oder Korallenschnabel-Hornvogel
source: painted by and by courtesy of Prof. Eberhard Curio, Ruhr-University, Bochum, Germany
Source: https://commons.wikimedia.org/wiki/File:A_waldeni_flying.jpg

The Walden's hornbill (Aceros waldeni) locally called dulungan, 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. It is closely related to the writhed hornbill, but can be recognized by the yellow throat and ocular skin in the male, and the blue throat and ocular skin in the female (both throat and ocular skin are deep orange or red in both sexes of the writhed hornbill). Its binomial name commemorates the Scottish ornithologist Viscount Walden.
Order: Bucerotiformes
Family: Bucerotidae
Genus: Aceros
Species: Aceros waldeni Sharpe, 1877
Synonyms: Aceros leucocephalus waldeni