Richard Du Toit / White Rhinoceros (Ceratotherium simum) mother and calf with Cattle Egret (Bubulcus ibis), Rietvlei Nature Reserve, South Africa

Marie Read / Flock of White ibis (Eudocimus albus) in breeding plumage, at rookery on water's edge of the mangrove-covered island, Tampa Bay, Florida, USA, March

Felicity Lanchester,Felicity Lanchester / Mixed group of Cattle egrets (Bubulcus ibis), Great egrets (Ardea alba), African openbill storks (Anastomus lamelligerus) and Sacred ibis (Threskiornis aethiopicus) gathering to roost, Selous Game Res...

Axel Gomille,Axel Gomille / Black-headed Ibis / Oriental Ibis (Threskiornis melanocephalus), Karnataka, India

Axel Gomille,Axel Gomille / Black-headed Ibis / Oriental Ibis (Threskiornis melanocephalus), Karnataka, India

Mary McDonald / Flock of Cattle Egrets (Bubulcus ibis) in roosting trees at dusk, Imba Ndutu, Serengeti NP, Tanzania, East Africa.

Thomas Mangelsen / White Ibis (Eudocimus albus) trio feeding at sunset, Ding Darling National Wildlife Refuge, Sanibel Island, Florida

George Sanker / American white ibis (Eudocimus albus) feeding amongst plants in morning light. Myakka River State Park, Florida, USA, March.

George Sanker / American white ibis (Eudocimus albus) wading in morning light. Myakka River State Park, Florida, USA, March.

George Sanker / American white ibis (Eudocimus albus) foraging in morning light. Myakka River State Park, Florida, USA, March.

George Sanker / American white ibis (Eudocimus albus) wading in morning light. Myakka River State Park, Florida, USA, March.

Marie Read / Avian feeding frenzy with a flock of White Pelicans (Pelecanus erythrorhynchos) swimming along a channel chasing school of fish. A mixed flock of long-legged waders, including Great Egrets (Ardea alba...