Chalk Hill Blue at Pewley Down
Pewley Down compared with the national indices
This chart shows national fluctuations in abundance (in black) and abundance on this site over time (in red).
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The UK Butterfly Monitoring Scheme is organized and funded by Butterfly Conservation (BC), the Centre for Ecology and Hydrology (CEH), the British Trust for Ornithology (BTO), and the Joint Nature Conservation Committee (JNCC). The UKBMS is indebted to all volunteers who contribute data to the scheme.