Why are crows coming on so strongly in an urban/suburban environment? Is this just a natural swing in population or has man's hand being stirring the cauldron again? Combining the natural intelligence of crows and their strong social network, crows have taken advantage of vast new areas of habitation. These areas of suburbanization, or "sprawl', provide an enhanced environment that crows are now thriving in. Это и многое другое вы найдете в книге On The Proliferation of Crows (Michael Schefers)