Neil Aldridge / Southern yellow-billed hornbill (Tockus leucomelas) displays while calling in winter, Kruger National Park, South Africa.

John Waters / Southern Yellow billed Hornbill {Tockus leucomelas} Kalahari Desert, Northern Cape, South Africa

Staffan Widstrand / Southern Yellow-billed Hornbill, (Tockus leucomelas) tossing a fly larva at a carrion site, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa

Staffan Widstrand / Southern Yellow-billed Hornbill, (Tockus leucomelas), eating fly larvae at a carrion site, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa

Lucas Bustamante / Southern yellow-billed hornbill (Tockus leucomelas)?? on ground, Moremi Game Reserve, Botswana.

Jen Guyton / Southern yellow-billed hornbill (Tockus leucomelas) in Kruger National Park, South Africa.

Jen Guyton / Southern yellow-billed hornbills (Tockus leucomelas) guarding their nest hole in a tree, Kruger National Park, South Africa.

Loic Poidevin / Southern yellow billed hornbill (Tockus leucomelas) male in tree, Kenya

Ann & Steve Toon / Southern yellowbilled hornbills (Tockus leucomelas) courtship display. Kruger National Park, South Africa. September.

Wim van den Heever / Southern Yellow-Billed Hornbill (Tockus leucomelas) yawning while sitting on the ground, Sabi Sand Game Reserve, South Africa

Neil Aldridge / Southern yellow-billed hornbill (Tockus leucomelas) perched on a broken branch, Kruger National Park, South Africa.

Neil Aldridge / Portrait of a Southern yellow-billed hornbill (Tockus leucomelas) in early morning. Kruger National Park, South Africa.