When the butterflies emerge the proboscis is in two parts. They 'zip' it together by curling and uncurling the two pieces. This one could not manage to complete that and they remain in two parts. I did not release it today, I'll keep this one and the clear wing moth until they kick the bucket.

**update - I ended up release both. The butterfly was more active then any of the others and took off straight away.

Note also that this butterfly uses only 4 legs for standing on. https://en.wikipedia.org/wiki/Nymphalidae