Has anyone seen this before?

[mstphoto]

Yesterday, I took a trip to RSPB Troup Head here in Aberdeenshire.
I noticed quite a few of the Gannets had this solid black eye.
In all the years I've been visiting the colony, I have never seen this

Bird 10 by Mike Stephen, on Flickr

 

[The W]

I gather it's a symptom of bird flu.

https://BANNED/m_r_atkinson

 

[mstphoto]

I gather it's a symptom of bird flu.

https://BANNED/m_r_atkinson

I did wonder it AF had something to do with it

 

[mstphoto]

UPDATE
I emailed our local RSPB centre and they confirmed that sadly it is a sign of Avian Flu

 

[jerry12953]

That's very sad. I don't think I'd have noticed it.