UK population estimates from the 2007 Breeding Little Ringed Plover and Ringed Plover surveys /
Conway, G. J.
British Trust for Ornithology.
Cardiff Harbour Authority.
Thetford : British Trust for Ornithology,
2008.
"September 2008"
"Report of work carried out by the British Trust for Ornithology under contract to Natural England, Scottish National Heritage, the Countryside Council for Wales, the Environment & Heritage Service (Northern Ireland), Anglian Water and the D'Oyly Carte Charitable Trust."