Looks more like taken in the African savannah than in the middle of Vienna, doesn't it? As soon as the sun sets, the crows start to gather on their sleeping trees (Apparently not every tree is suitable as sleeping tree, because they always have to fight for their place to sleep, although there would be so many other trees in the Prater) See a few more new images at http://www.pbase.com/ekke/gallery/thebirds