Bence Mate / Great egret (Ardea alba) drops a fish from its beak and a Black headed gull (Larus ridibundus) flies in to catch it. Lake Csaj, Kiskunsagi NP, Hungary, January. Winner, Eric Hosking award, 2011 Wildli...

Wild Wonders of Europe / Damschen / Black storks (Ciconia nigra) Grey herons (Ardea cinerea) and Great egret (Casmerodius albus) in river, Elbe Biosphere Reserve, Lower Saxony, Germany, September 2008

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

Tony Heald / Black heron / egret (Hydranassa / Egretta ardesiaca) Chobe National Park, Botswana

Tony Heald / Black heron / egret (Hydranassa / Egretta ardesiaca) umbrella feeding, using wings to shade water below, Chobe National Park, Botswana

Tony Heald / Black heron / egret (Hydranassa / Egretta ardesiaca) umbrella feeding, using wings to shade water below, Chobe National Park, Botswana

Stefan Huwiler / Black Rhinoceros (Diceros bicornis) adult feeding among Cattle Egret (Bubulcus ibis). Lake Nakuru, Kenya, Africa, October.

Brent Stephenson / Pacific / Eastern Reef Egret (Egretta sacra) in profile on shore. Puka Puka, Tuamotus, French Polynesia, November.

Suzi Eszterhas / Cattle Egret (Bubulcus ibis) sitting in Black-headed weaver (Ploceus cucullatus) nesting colony, Ngamba Island, Lake Victoria, Uganda

Suzi Eszterhas / Cattle Egret (Bubulcus ibis) predating Black-headed weaver (Ploceus cucullatus) chicks from their nests, Ngamba Island, Lake Victoria, Uganda

Suzi Eszterhas / Cattle Egret (Bubulcus ibis) in flight carrying Black-headed weaver (Ploceus cucullatus) chick, that it has taken from nest. Ngamba Island, Lake Victoria, Uganda