Marie Read / American oystercatcher (Haematopus palliatus) adult feeding chick, Long Island, New York, USA. June.

Marie Read / American avocets (Recurvirostra americana) two during aggressive (territorial) encounter, Bear River Migratory Bird Refuge, Utah, USA, May.

Thomas Hinsche/ BIA / Black-crowned Night Heron (Nycticorax nycticorax) juvenile foraging, Hungary

Thomas Hinsche/ BIA / Black-crowned Night Heron (Nycticorax nycticorax) juvenile, Hungary

Thomas Hinsche/ BIA / Black-crowned Night Heron (Nycticorax nycticorax) with fish prey, Hungary

George Sanker / Greater yellowlegs (Tringa melanoleuca) standing on rock. Acadia National Park, Maine, USA. September.

Paul Souders/ Worldfoto / Black Heron (Egretta ardesiaca) canopy hunting, Chobe River, Chobe National Park, Botswana

David Perpinan / Male Lapwing (Vanellus vanellus) arriving at nest to incubate eggs, female leaves, Scottish Borders, Scotland, UK, June.

David Perpinan / Oystercatcher (Haematopus ostralegus) incubating eggs on nest, alarm calling as a predator flies overhead, Scotland,UK, June.

Chris Gomersall / Large flock of Red knot (Calidris canutus) moving at high tide roost, in winter plumage, Snettisham RSPB Reserve, Norfolk, England, UK, September.

Dave Bevan / Grey plover (Pluvialis squatarola) eating a marine flatworm, Norfolk, England, UK, February.

John Waters / Wide-angle shot of wetland landscape at sunset, with Lapwings (Vanellus vanellus) flying to roost, Ham Wall RSPB Reserve, Somerset Levels, England, UK, February.