1 Marsh Harrier, with yellow wing tags both with “AB” in black letters.
I found this webpage https://www.nwnrg.co.uk/research/marsh_harrier/MH_Project_Recoveries.htm
that indicates this was tagged as a female nestling near Manea, Cambridgeshire on 14 June 2024. I have emailed for confirmation.
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| Wing-tagged Marsh Harrier “AB” © Stephen Burch |