Ingo Arndt / Shoebill (Balaeniceps rex) portrait, Uganda.

Tom Gilks / Ibis and Pig foraging for food on lake edge, Remba Island, Lake Victoria, Kenya.

Steve Knell / Spoonbill (Platalea leucorodia leucorodia) adult in summer plumage, Hungary, May.

Steve Knell / Spoonbill (Platalea leucorodia leucorodia) adult in summer plumage, Hungary, May

Steve Knell / Spoonbill (Platalea leucorodia leucorodia) adult in summer plumage,in flight about to land. Hungary, May.

Steve Knell / Great white egret (Egretta alba alba) in flight, coming in to land. Hungary, May.

Steve Knell / Grey heron (Ardea cinerea cinerea) standing in water, Hungary. May.

Tui De Roy / Magnificent Frigatebirds (Fregata magnificens) and Brown Pelicans (Pelecanus occidentalis) feeding on small schooling fish in the low tide shallows, Isabela Island, Galapagos Islands, Ecuador. Decembe...

Konrad Wothe / Green-backed Heron (Butorides striatus rutenbergi) in mangrove tree near Morondava, Madagascar, Africa

Juan Carlos Munoz / Group of five Brown pelicans (Pelecanus occidentalis) in flight, Isla Holbox, Yucatan Peninsula, Mexico.