Sadly, the caterpillar who chose to pupate under a sycamore leaf was gobbled up by some unknown creature, demonstrating that sometimes tradition trumps free thinking:
Hostilian on 16th June:
Hostilian on 19th June:
Can anyone suggest what these black spots are? They appear in broadly the same places on both sides but not symmetrically.
Novus today, 5th July:
A third individual reached pupation age, ate half his seat leaf (as they always do before wandering) and disappeared. He was on a small sapling and definitely left the plant. When I can find his pupa I will be able to say if he travelled via the ground or stuck to the aerial parts of plants.
Finally, here is a freshly emerged male in North Italy a couple of days ago:
He was quite unfazed by my Jack Russell, Minnie: