Boloria (Clossiana) selene
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Male, France, August 2008
Female, Val d'Aran, July 2011 (at 2300m)
Val d'Aran, July 2011
Male, French Jura, June 2008
French Jura, June 2008
More or less normal colouration, here seen in Norway, some time in the early 90s.
This specimen from the Vosges has particularly dark, thick borders, as did all the small pearl-bordereds in the colony.
Distribution
I see this widespread species
surprisingly
little. It is absent from East Anglia - the part of England I come from
- and extremely local in Switzerland. I have seen it in France, Norway
and the Spanish Pyrenees, and it is not regarded as a scarce butterfly,
but I have embarrassingly poor shots of it. At low altitudes and in the
warmer south, it flies in two broods, in May-June and July-September,
while further north - in the UK, for example - it flies in a single
brood from May to July. The female I show above, from the Pyrenees, was
photographed at over 2400m at the tail end of July - so I'm not sure
how much to trust the official phenologies! The species is found in a
variety of habitats, from lowland forests to upland moorlands, provided
only that there are violets for the larvae to feed on.
Although superficially
similar to the
pearl-bordered fritillary, the small pearl-bordered fritillary is in
fact easy to identify. From the upperside, the narrow submarginal
chevrons, fully joined to the border so as to enclose discrete spaces,
are distinctive. In the male pearl-bordered fritillary, these are more
like floating triangles, and in the female, while they may join the
border, they are thicker and more triangular. In addition, s.2 of the
forewing gives the impression of being emptier, with the post-discal
mark relatively closer to the submarginal markings and the basal mark
pressed against the cell. The underside is easier, however. The pearls
around the edge are bordered internally by neat, black chevrons, rather
than more diffuse, reddish ones and there are black post-discal spots
further in - unlike the reddish post-discal spots in the pearl-bordered
fritillary.
The small pearl-bordered
fritillary hibernates as a larva in most of Europe, and as a pupa in
parts of Scandinavia.