Red-Knobbed Hornbill, IndonesiaThe red-knobbed hornbill is a big bird. Despite their size, however, they can be hard to spot as they are very secretive. I photographed this one in Tangkoko National Park on the island of Sulawesi in Indonesia. They are listed as a “vulnerable” species due to habitat destruction throughout their range. Nikon D300 with Nikkor 200-400mm lens (at 400mm) ISO 1600, f/4 at 1/1600th of a second.