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Old Thursday 8th August 2019, 12:48   #558
halftwo
Wird Batcher
 
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Join Date: Aug 2006
Location: Silkstone Common
Posts: 8,629
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Well, I've just aged the female bird of my pair - she's 2nd calendar year!
Only 5% of breeding females are this young. And that might explain the infertile egg amongst the clutch.
Also, she lifts her right leg off the perch whilst resting - and one of last year's juveniles, post-fledge, had a gammy right leg - it could be that bird - now mated with her father!!
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