Little Egret with a touch of grey???? (1 Viewer)

[trooper]

For the last three days there has been a Little Egret on my local patch, for us here a big rarity!!. It is a juveneile and on the belly has grey patches which isn´t shown in any book and which I have never seen on any other Little Egret that I have seen in the UK or France. Has anybody an idea why this could be, could this be a hybrid??(Reef Egret??) I am gratefull for any ideas.
There are pictures of the Little Egret on www.naturgucker.de :-
click on Arten, then vögel then in the rubricen Art im lexikon suchen enter Seidenreiher then click Bilder and the pictures from Norbet Kiefer are the said bird.(complicated but worth it)

 

[Jacana]

just a bit of mud i think

 

[nickderry]

looks like some sort of pollution, the feathers appear matted.

 

[trooper]

Its been seen by other birders and we are sure it is not mud or dirt, and when you see it live it definitly is not matted!!