This and the two beneath show a female baton blue, in the Val
The baton blue is widespread but generally local in most of
western Europe. It is absent in the North and replaced in most of
Iberia by the Panoptes blue, Scolitantides
panoptes. In the eastern half of Europe it is replaced by the
almost identical eastern baton blue, Scolitantides
vicrama. It thrives in warm places with short grass where its
foodplants, principally various species of thyme and lavendar, grow.
The combination of small size, cell spot, chequered fringe and bright
orange lunules on the hindwing separate this species from most others.
The chequered blue is larger, with much bolder markings beneath. The
Panoptes blue has much weaker orange lunules on the hindwing. No other Scolitantides species fly in the
same region, though there may be an area of overlap with the eastern
baton blue, Scolitantides vicrama,
long considered the same species. This is said to be slightly larger
but is otherwise identical and probably not safely distinguishable in
the field on wing characters alone.
The baton blue has two generations a year, the first flying from April,
or sometimes later March, until June, and the second from July until
the autumn. It hibernates as a pupa.