Unique to the Philippine islands of Panay and Negros, a Walden’s hornbill clings to the hollow tree in which he nests. The distinctive structure at the top of the bill, called a casque, helps hornbills project their harsh call cross the canopy. This species and the forests it inhabits are both critically endangered. Commercial logging and slash-and-burn agriculture have spared only 7 percent of the original lowland forests that once blanketed the Philippines.