Hello Dennis
I have always felt that the micro climate of a bred species will encourage faster development.
When we checked the national history museum collection for ‘local’ specimens it was quite apparent that many of the bred pinned specimens from across the country had considerably earlier dates (within the flight period) to those that had simply been captured and then had a pin stuck in them.
This was one of our arguments for why the individual seen in West Norfolk in the 2004 on the 26th July was the genuine article!
Liz
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