Rare British Butterflies See 600% Increase in Numbers

via internet science tech

Bonnie reported before on efforts to revive an extinct butterfly in the UK, and we've seen Europe's grassland butterfly populations in alarming decline in the last few years. But there is good news too. THe Independent reports that conservation efforts and an unusually dry, warm late summer last year have meant that many of Britain's most threatened butterfly species are seeing huge increases in numbers:

Butterfly experts are cautiously optimistic that if Britain has a similar summer this year, some of the most threatened species could make a significant recovery after populations plummeted in recent years because of bad weather, habitat loss and intensive farming. Continuous or heavy rain makes its hard for butterflies to survive because the temperature is usually too low for them to fly.

The wood white is Britain's smallest butterfly and its numbers have fallen by 96 per cent since the Seventies. But last year suggested increases of 600 per cent, with the most sightings in Herefordshire, Buckinghamshire and across Ireland. The marsh fritillary, which has also been in decline, increased by 134 per cent and the Adonis blue by 74 per cent.

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