Tuesday 15 September 2020

Rearing of Mystery Larva

 We found this young larva in our woodland moth trap on the fourth of July this year and as we had no idea what it was we decided to try and rear it. It conveniently took to eating bramble leaves and went through four instars before pupating a month later.  The adult moth finally emerged 5 weeks later revealing itself, somewhat to our surprise, as a female White Ermine; unfortunately its wings failed to unfold properly.  Is this a partial second generation moth or was it too well fed and nurtured emerging early instead of pupating over the winter?

Carolyn & Evan    

                July 4th                                               Next instar July 6th         

    Next instar July 11th                                      Final instar July 23rd   

                                        Emerging pupa August 4th

                                                                                                                                         Adult White Ermine September 12th

1 comment:

  1. They do have a second generation, particularly in the south. In Ceredigion there are 15 adult records in September out of a total of nearly 4500 records. The malformation may be due to temperature whilst in captivity.


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