I have bundled these two together because they are both members of the corvidae family of birds. This family is widely considered the most intelligent of all birds. Crows top the avian IQ scale, which is a scientific test to determine bird intelligence. They can count, distinguish complex shapes, and perform observational learning tasks. Crows are extremely social creatures and will engage in mid-air jousting to establish pecking order. Wild hooded crows in Israel have learned to use bread crumbs as fish bait, thinking in advance and anticipating the catch. The New Caledonian Crow has been intensely studied because of its ability to use tools in its every day search for food. This includes creating knives which are cut from leaves and stalks of grass. They also use advanced plucking, smoothing, and bending of twigs and grass stems to produce a variety of food substances. Ravens are similar to crows, but larger in size. Both species are black in color and the main difference is in their vocalizations. Ravens perform many of the same behaviors as crows, but they have been recognized for their ability to drop nuts, clams, muscles, and shells on to the highway, wait for a car to run them over, and then gather the prize.
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