Tuesday, July 20, 2010

spread of emergences

In Little Wood Oxon today, Mick and Wendy Campbell [ when all of us in Upper Thames were thinking that the season was almost over] saw two fresh males exhibiting typical territorial behaviour, clashing and chasing over a large Ash which is always used in this wood. Mick could see one of them through his bins and it was certainly a fresh specimen. Activity over this tree was first seen this season on June 28th, three weeks ago, suggesting that emergences can be spread over about 21 days.
I would appreciate your comments/experiences.

1 comment:

Matthew Oates said...

beterFresh can be rather an illusion. The fresh-looking males (i.e. black and intact) at Savernake turn out to be a good week old when they descend. Maybe some wear unusually well.