I spent a very nice day in the company of Cristian Mihai, birding in the city area.
This bird was a shock - a partial albino/leucistic Caspian Gull! This image is very poor - the bird was miles away and so this is a heavily cropped photo taken with two converters (a 2x and 1.4x) placed back to back to help overcome the distance; still, it gives the general impression of this interesting bird. Also in the pic are other cachinnans and michahellis.
1 cy (soon to be 2cy) cachinnans