Cecropia Silkmoth
Family Saturniidae, Subfamily:  Saturniinae
Hyalophora cecropia
Cocoon Construction and Pupa

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Photos of caterpillar constructing a cocoon




Photos of various cecropia cocoons


#1 purged liquid and began forming cocoon 6 August
I carefully opened cocoon to track how many days
until it pupated.  Pupa was formed 16 August 2013

The large antennae  indicate the pupa is male

#1 purged liquid and began forming cocoon 6 August
Pupa was formed 16 August 2013


Male and Female  pupa comparison - May 2014
Note  male on  left has much wider antennae than  female on  right
Notice the female is  larger than the male
male female comparison

Photo Details - ©Nicky Davis
In 2013 I received ova from Kevin Collison of Osceola, Polk County, Wisconsin (elevation 825 feet). He reared some cecropia in 2012 and when the females emerged in 2013 he mated the females with wild caught males.

Females o
viposited 26 June 2013

First Instars - Began Emerging 7 July 2013 and continued to 9 July 2013.   100 percent hatch rate.
First instars were 5 mm long..

Second Instars began molting  7:14 P.M. on 11 July 2013 .
They were 10 mm long right after molting.

Molted to Third Instar 16 July 2013

Molted to Fourth Instar 22 July 2013

#1 Molted to Fifth Instar 27 July 2013

#1 purged excess liquid on 6 August 2013 and began spinning cocoon.

#1 Pupa formed 16 August 2013  which was ten days from the day caterpillar purged liquid and began spinning the

These  were placed in the crisper of a fridge at about 41 F. on 29 September 2013.

Some were taken out of hibernation on April 7, 2014 and some on May 1, 2014.  Photos of Male and female pupa  for comparison.

Host Plant

Black Chokecherry - Prunus virginiana var. melanocarpa


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