The puriri moth, Aenetus virescens, is a moth of the family Hepialidae, endemic to the North Island of New Zealand. It is New Zealand’s largest moth, with a wingspan of up to 150 mm.
The moth spends the first five to six years of its life as a grub in a tree trunk (including non-native species such as Eucalyptus), with the last 48 hours of its life as a moth. Footage has been taken of a puriri moth chrysalis hatching over a period of one hour and forty minutes.
(From Wikipedia, March 2013)