Robin Chittenden / Great stone-curlew (Burhinus recurvirostris / Esacus recurvirostris) Sri Lanka.

Robin Chittenden / Great stone-curlew (Burhinus recurvirostris / Esacus recurvirostris) Sri Lanka.

Lynn M. Stone / Grey plover (Pluvialis squatarola) foraging on sandy beach in late afternoon, Santa Barbara, California, USA. October.

Lynn M. Stone / Semipalmated plover (Charadrius semipalmatus) on mud bar at low tide, St. Petersburg, Florida, USA. April.

Lynn M. Stone / Black-bellied plover (Pluvialis squatarola), beginning to show breeding plumage, foraging along beach, St. Petersburg, Florida, USA. April.

Sylvain Cordier / Bush stone-curlew (Burhinus grallarius) on the nest, Queensland, Australia

Lynn M. Stone / Black-bellied plover (Pluvialis squatarola), moulting into breeding plumage, at edge of salt marsh. Mullet Key, St. Petersburg, Florida, USA.

Robin Chittenden / Great thick-knee (Burhinus recurvirostris) two standing side by side, Sri Lanka.

Roger Powell / Bush stone-curlew (Burhinus grallarius) with two chicks. Werribee, Victoria, Australia.

Roger Powell / Bush stone-curlew (Burhinus grallarius) standing over its egg. Werribee, Victoria, Australia.

Pete Oxford / Great thick-knee (Esacus recurvirostris) National Chambal Gharial Wildlife Sanctuary, Madhya Pradesh, India

Pete Oxford / Great thick-knee (Esacus recurvirostris) National Chambal Gharial Wildlife Sanctuary, Madhya Pradesh, India