Butterfly wings often get danaged and they survive amazingly well with ragged wings but i dont think it can grow a wing back.
If up to30% of a wing tip is missing, it is possible to snip the other wing to match it, to restore even flight, in some cases its also possible to repair damaged wings with a contact adhesive ( often done in Butterfly farms)
Typical life cycle -
1, egg-2-4 days
2,caterpillar (larva)2-3 weeks
3,pupa (chrysalis) 1-4 weeks
4. adult 2-4 weeks.
Some species caterpillars that over-winter ie the peacock may live as long as 11 months.