These birds were quite common in an urban park near where we were staying in Istanbul. I hadn't taken my bird books to Turkey, so while we were there I couldn't put a name on them—other than calling them crows. They turned out to be hooded crows. Under the name Corvus corone cornix, they had long been considered a subspecies of carrion crows, but were recently elevated to species level as Corvus cornix.
Deniz took the next picture.