Angelo Gandolfi / Cattle egret (Bubulcus ibis) on back of Dromedary camel (Camelus dromedarius), Morocco.

Angelo Gandolfi / Cattle egret (Bubulcus ibis) on head of Dromedary camel (Camelus dromedarius), Morocco.

Theo Allofs / Lechwe (Kobus leche) and Cattle Egret (Bubulcus ibis) in Moremi Game Reserve, Okavango Delta, Botswana

Steven David Miller / Cattle Egret {Ardea ibis} on nest with chicks, summer, Caversham Wildlife Park, Perth, Western Australia, captive

Pete Oxford / Cape Buffalo (Syncerus caffer) herd with Cattle Egret (Bubulcus ibis) flock in clearing, Africa

Jean E. Roche / Wild horse (Equus caballus) grazing with Cattle egret (Bubulcus ibis) perched on back. Camargue, France.

Gabriel Rojo / Cattle egret with chick at nest {Bubulcus ibis} La Pampa, Argentina

Gabriel Rojo / Cattle egret with chicks at nest {Bubulcus ibis} La Pampa, Argentina

Gabriel Rojo / Cattle Egret {Bubulcus ibis} Argentina

Tim Fitzharris / African Elephant (Loxodonta africana) parents and two calves with Cattle Egret (Bubulcus ibis) flock, Kenya

Mitsuaki Iwago / Black Rhinoceros (Diceros bicornis) grazing in grassland surrounded by a flock of Cattle Egrets (Bubulcus ibis), Ngorongoro Crater, Tanzania

Mitsuaki Iwago / Black Rhinoceros (Diceros bicornis) with Cattle Egret (Bubulcus ibis) on its back, Ngorongoro Crater, Tanzania