pied avocet at rye harbour

aewa animal avocet avosetta backwards bill bird birding birdlife birdwatching black blackcapped blue bluish bold brackish breeding britain british conservation curved east england eurasian europe extirpated feathers forage grass harbour kingdom large legs long markings migratory mud nature ornithology patches pied plumage protection recolonisation recovering recurvirostra recurvirostridae recurvus rostrum royal rspb rye scything shallow side society species spring stilt striking sussex trust united upturned wader water waterbird wetland white wildlife