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Biological Records Centre (BRC) |
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Butterfly Conservation (BC) |
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British Trust for Ornithology (BTO) |
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Joint Nature Conservation Committee (JNCC) |
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Butterfly Conservation Europe (BCE) |
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Natural England (NE) |
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Natural Resources Wales (NRW) |
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Scottish Natural Heritage (SNH) |
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Northern Ireland Environment Agency (NIEA) |
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WCBS Methodology |