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This nest was originally covered with some birch leaves.
The leaves were removed after a week since I could see the
pupa had formed inside the nest. Some of the larvae were placed
inside an empty toilet paper roll placed inside a container lined
with paper after they purged liquid but before they made the cocoon.
This was done to avoid any potential problems with leaves or stems
being too firmly attached to the cocoon.
Then the thick silk nest was carefully removed
Front view of pupa 26 July 2011
Side view of pupa on 26 July 2011
Front view of pupa on 29 July 2011 - One day before the adult emerged
Side view of pupa showing eyespot on wingcase - 29 July 2011 - One day before adult emerged