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) perched on branch, Etosha National Park, Harare Province, Namibia.

Juergen & Christine Sohns / Southern Yellow-billed Hornbill (Tockus leucomelas) flying, Kruger National Park, South Africa

Juergen & Christine Sohns / Southern Yellow-billed Hornbill (Tockus leucomelas) hunting flying insect, Kruger National Park, South Africa

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

Francois Savigny / Southern yellowbilled hornbill {Tockus leucomelas} perching on branch with beak open, Kruger NP, South Africa

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