As I mentioned, kibbled cat or dog food (pea sized chunks) is cheap and provides complete nutrition for the omnivorous crows. You can make it easier for them by offering shelled nutmeats or unsalted peanuts, which they can open easily. Crows will eat eggs and nestlings of songbirds, and in some areas might have a significant impact of a local population of birds. Like most of its relatives, Fish Crows will eat almost anything, including carrion, trash, nestlings and eggs of other birds, berries, fruit, and grain, and any items they can steal from other birds. Fish Crows have expanded their range inland and northward along major river systems in recent decades. Their association with water leads them to eat crabs, marine invertebrates, and turtle eggs more than other crows. Meat scraps are always a hit as is cheese and egg yolk. Fish Crow Identification, All About Birds, Cornell Lab of Ornithology Not everyone realizes it, but there are two kinds of crows across much of the eastern United States. Crows are omnivorous and they primarily feed on small insects, nuts, fruits, mollusks, seeds, weeds, frogs, eggs, mice, earthworms, and carrion. Wild crows eat all kinds of nuts. In agricultural areas like grain fields these species eat several tiny insects that are harmful to the fields, indeed helping farmers; however, they also eat grains that certainly do not assist agricultural men. Far more likely, however, is that crows are but one of a host of species preying on the "desirable" wildlife, and removing crows will make no change in the end result (that of most of the young birds/eggs being eaten). As for what you should feed crows, that’s the easiest part of the whole business. They will eat almonds, acorns and walnuts, along with any nuts common to your area, typically flying off to crack them open.