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Female, Switzerland, June 2018
Female, Switzerland, June 2018
Male, Switzerland, June 2017
Male, Switzerland, July 2017
Female, Switzerland, July 2019
Female, Switzerland, July 2019
Italy, June 2012
Male, Switzerland, June 2011
Dark male, Switzerland, October 2013
Switzerland, June 2007
Male, Val d'Aran, July 2008
Val d'Aran, July 2005
Val d'Aran, July 2005
Distribution
Older books put this species
in the currently obsolete genus Mesoacidalia,
distinguishing it from the high brown and Niobe fritillaries (former
genus Fabriciana)
as well as from the silver-washed fritillary (Argynnis). More
recently, all these were subsumed into the genus Argynnis. More
recently still, it has proposed that the dark green fritillary is
closer to the New World Speyeria
fritillaries and some databases have already moved it there. The
position is considered in detail by Moya et al. (2017), who conclude
that there are two consistent options: either to broaden the genus Argynnis to include
the species known across the Atlantic as Speyeria, or to
retain the genera Speyeria,
Argynnis
and Fabriciana.
If you choose the latter option, the dark green fritillary is placed in
subgenus Mesoacidalia
of the genus Speyeria.
At present, however, Fauna Europaea has it in the genus Argynnis, subgenus Mesoacidalia, so
that is where I leave it for the time being. When I receive the 2020
Kudrna atlas I will see what his opinion is!
The dark green fritillary is
widespread in
Europe and generally common, though absent locally from much of the
area in orange on my map. It is absent, for example, in Suffolk, in
East Anglia (my UK base). Like the other large fritillaries, it is a
violet feeder, but it is not restricted to woods. In fact, it is more
often seen cruising over meadows and on moorland, frequently stopping
to nectar. It is a restless butterfly, always on the alert even when
feeding, and so difficult to photograph. Despite its being a common
butterfly (or perhaps partly because of this, as it is easy to neglect
common species), I have very few good pictures of it.
The freshly emerged larva hibernates before feeding in ground litter,
waiting for the first fresh violets of spring before beginning to enjoy
itself. Adults emerge from June in a single generation which lasts well
into the autumn. In the mountains I have often seen dark green
fritillaries in October.