A new Red List of British butterflies

@article{Fox2011ANR,
  title={A new Red List of British butterflies},
  author={Richard Fox and Martin S. Warren and TOM M. Brereton and David B. Roy and Anna Robinson},
  journal={Insect Conservation and Diversity},
  year={2011},
  volume={4}
}
1. Over the last century butterflies have undergone substantial changes in abundance and range in Great Britain and monitoring has improved markedly. These changes, together with a major revision of International Union for Conservation of Nature (IUCN) criteria, render previous Red List assessments outdated. 
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