example I found in cold, dark, wet, windy conditions.
This butterfly is confined to the extreme north of
Europe, in N Norway, N Sweden and N Finland. It is extremely local. It's
preferences are for rocky grassy places. I was very lucky in 2010 to
find a single roosting specimen in cold dark wet conditions.
taxon is often considered as a subspecies of the Glandon Blue, A.
glandon. The close relationship is clear. On purely geographical
isolation of the current distribution speciation is highly likely - but
I don't know the origin of this taxon following the last ice age when it
and its Alpine cousins from much further south may have survived in the
same refuges. The debate is likely to continue!