A poorly known, mid-sized coucal endemic to Biak island. All black plumage, distinctive yellow iris, straightish bill and a fierce-looking face. Found in dense forest and secondary habitat at all levels and devilishly difficult to see. The only coucal species found on Biak. Vaguely similar to Torresian Crown, but Biak Coucal is more skulking with longer tail. Quite vocal and heard far more often than seen. Call, a series of deep, upDslurred “wup!” notes given at varying speeds.