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Friday, 20 February 2026

Partially leucistic marsh harrier, Martin Mere


There's been a remarkable looking female marsh harrier at Martin Mere for at least a month, but before today I'd not even managed a good look at it let alone a decent photo. Still not great photos but at least they give the general idea of how the bird looks.

From a distance it's a very brown and white looking bird to such an extent that it was reported as an osprey at the start of its stay. Some have suggested that it's an old female, but while I can understand the logic that the yellow bits might go a lot paler with age, this bird has pale patches in areas where there are not normally pale patches on typical female marsh harriers, especially on it's breast and underwing.

In my opinion its' a partially leucistic marsh harrier. 



Look at that underwing!





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