Staffan Widstrand / Wild Wonders of China / Crested ibis (Nipponia nippon) flying, Yangxian Nature Reserve, Shaanxi, China, September.

Dave Watts / Northern bald ibis (Geronticus eremita) feeding, Morocco, Critically endangered species.

Dave Watts / Hermit ibis (Geronticus eremita) flock in flight, Morocco. Critically endangered.

Dave Watts / Hermit ibis (Geronticus eremita) colony, near Tamri, Morocco. Critically endangered.

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

Nick Garbutt / Scarlet Ibis (Eudocimus ruber) flying into roost sight at dusk, Hato La Aurora Reserve, Los Llanos, Colombia, South America.

Juan Carlos Munoz / Northern Bald Ibis (Geronticus eremita) captive, Apenheul Park, Netherlands.

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

Staffan Widstrand / Wild Wonders of China / Crested ibis (Nipponia nippon) in water, Yangxian nature reserve, Shaanxi, China

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