Yellow billed hornbills are quite common and can be seen perched in trees, though they tend to fly off when the vehicle stops. It's possible to photograph them just after sunrise when they are more reluctant to fly as in this image. Canon EOS-1DX with 300mm f/2.8L IS lens and 1.4 III converter.
Ref: Yellow Billed Hornbill-2016-01
Location: Mala Mala, Sabi Sand
Photographer: Brian Sugden