I. podalirius migration

[P. Stadel Nielsen]

Hello all in Europe.

Last saturday, June 13., a very fresh specimens of Iphichlides
podalirius was found ca. 30 km. south of Copenhagen, Denmark. It was a
very yellow and absolutely intact female.
We wonder if it is a migrant from Germany or Poland, as it is unlike
to be an escapee from a butterfly house. However the last 10 days the
wind has been western of even northern, not exactly the right
direction for podalirius.
Does anyone know if podalirius is expanding its range or has been
migrating the last 2 weeks? It was seen last year also, and further
some specimens earlier years in Sweden and Finland.