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Populations of widespread breeding birds, butterflies and bats

England Biodiversity Strategy Indicators

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Title: Populations of widespread breeding birds, butterflies and bats
Year: 1990-2011
Geography: England
Units: Index 1970=(100)
Source: Bat Conservation Trust, Royal Society for the Protection of Birds, British Trust for Ornithology, Department for Environment, Food and Rural Affairs, Joint Nature Conservation Committee, The Wildlife and Wetlands Trust and Centre for Ecology and Hydrology,

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