RSPB Nature Reserves 200 reserves totalling 137,127 hectares SSSI or ASSI occurs on 150 reserves Supports at least 30 per cent of the UK breeding populations of 13 species of Birds of Conservation Concern, including bittern (39%), black-tailed godwit (93%), Slavonian grebe (46%), red-necked phalarope (78%) and roseate tern (80%).
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