Red Knobbed hornbill (Rhyticeros cassidix), near the nest, Tangkoko National Park, Sulawesi, Celebes, Indonesia

aceros cassidix rhyticeros cassidix rhyticeros bucerotidae coraciiformes aves vertebrata natural area adult alone trunk botany posing nest to nest back shot overview day indonesia vulnerable iucn vu national park cites appendix 2 october tangkoko national park knobbed hornbill rhyticeros cassidix nobody rhyticeros naturalness area stage of development individual enumeration morphology botany morphology organism reproductive behaviour behavior animal construction shot atmosphere ambiance insulinde south east asia far east asia iucn red list of threatened species species environment protection environment management biodiversity management environment convention on international trade in endangered species of wild cites sulawesi island hornbill coraciiforme bird wild animal bucerotidae coraciiformes aves vertebrata nature natural areas ecosystem ecosystems adults single lonely only solo one lone trunks botany posed pose settlings settling nesting nested nests view from behind back view back views back sight back shots back sights overviews global sight global sights full length days daytime vulnerable species national parks sensitive natural areas with nobody aceros cassidix rhyticeros cassidix