male knobbed hornbill rhyticeros cassidix at a nesting site in tangkoko national park, indonesia

aceros animal asia attraction bird bright cassidix color colorful colour colourful colours conservation critically day destination east endanagered family feeding forest hiking hornbill indonesia jungle knobbed male national nature nesting north outdoors outside park protected rainforest rhyticeros site south sulawesi tangkoko tour tourism tourist travel tree trees trekking vulnerable walking wildlife wrinkled young