. Crows are intelligent birds, what can think abstractly In legends, crows are cooperating with the devil, and in real life crows like jackdaws are making people mad, because they are stealing things like keys. Crows and ravens are smart birds, which might even think abstractly. Or at least they can make plans for the future, and that thing makes them extremely good objects for researching the advantage of intelligence. At this point, I must say that we shouldn't behave those animals as an object, because all intelligent animals are somehow unpredictable, and during those researchers, the scholars are also researching things like the advantage of personality. The thing is that only the animal that has enough space and stimulus is giving the data what researchers can use in the research. The research of intelligence and other things by using the birds is easier than using humans because the advantage of humans is taking so long time. And the thing that is seen is that a long