Image: Veronique Brosseau Matossy
One wing is out of the chrysalis.
The transformation inside the pupa can take anywhere between a week and 11 days, but finally the butterfly is ready to ‘eclose’, or break its way out of the pupa. When it’s first formed, the pupa is soft and flexible, but gradually it hardens until it can be split or cracked open. While it’s pushing itself out of the pupa, the butterfly uses fluid called hemolymph to pump its wings up and expand them. The butterflies will also expel a reddish-colored waste product of metamorphosis (called meconium) as they emerge from the pupa.