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Male, Provence, July 2004
The furry blue flies in two
distinct subspecies, one in the South of France (vittatus) and one
in Italy (virgilius).
These are sometimes treated as distinct species. I have only seen the
species once, in the South of France in 2004, and then only a few
individuals. The pictures above are all frames from video I took on
The upperside of the male is
very similar to that of Forster's
furry blue, Polyommatus
of which I have many more photos. There is no risk of confusing these
two butterflies, however, as all the Spanish populations once
are now considered to be fulgens.
The female, too, is very similar from the upperside. The underside,
however, generally has a much weaker white stripe than in Forster's
furry blue. Like Forster's furry blue this is a species of hot, dry,
flowery scrub, often near cultivated places. The larval foodplant is
sainfoin. The butterfly flies in a single brood in July and August.