Argynnis aglaja

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DARK GREEN FRITILLARY Argynnis aglaja

The established population on the sand dune system centred on the Aisdale national nature reserve in south Lancashire remains stable. In Cheshire, the maps imply a reduction in numbers at coastal sites on the Wirral, but sontinued sightings of single butterflies elsewhere in the county, usually well away from any recognised habitat. In 2010 and 2011, and therefore not obvious from the map, there was a big increase in sightings in the Goyt Valley (SK07), and it is surmised that some of the butterflies seen in mid-Cheshire may have wandered from breeding grounds either here or further into the Derbyshire peak district.

A. aglaja favours rough grassland with some slopes, rather than the open woodland biotopes favoured by the other Heliconiines; however in places it seems to be adapting more to the latter type of habitat, and, as mentioned under A. adippe, is incresing in numbers and possibly out-competing that species at sites on the Morecambe Bay limestone (SD47).

THE THREE PERIODS COMPARED

PERIOD 1 (1940-1994) WITH RECORDING COVERAGE, ALTITUDE AND URBAN COVER

PERIOD 2 (1995-2000) WITH RECORDING COVERAGE, ALTITUDE AND URBAN COVER

PERIOD 3 (2001-2007) WITH RECORDING COVERAGE, ALTITUDE AND URBAN COVER

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