Satyrium w-album

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WHITE-LETTER HAIRSTREAK Satyrium w-album

As with the previous species, N. quercus, the present one is almost certainly more generally distributed and numerous than the maps show, and also the apparent concentration of records in the south Wirral during the second and third periods is far more likely to be due to increased recording effort than a genuine greater abundance of the butterfly in that area. It is unlikely however that the species will be as numerous as N. quercus, for the simple reason that Elm trees are now nowhere near as numerous as Oaks. From my own experience in the Mersey valley, Iwould suggest that S. w-album is slightly easier, or should I say slightly less difficult, to see than N. quercus. Anywhere with reasonably-sized Elms is worth trying; one noted locality is a suburban park in Blackpool.

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

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