A pupa is the life stage of creatures undergoing transformation between immature and mature stages.
From DailyOm “Autumn’s Beauty”
Appearances deceive in autumn. The transformations undergone by living beings seem much more like endings than the transitions they really are. Dormancy, not death, is the hallmark of fall. Your priorities will likely change as nature flares into sunset brilliance and then lapses slowly into slumber, but remember to rejoice in the beauty of nature where every finale serves as an overture for a new beginning.