Other calls sound similar. Northwestern crows, being smaller, also have a slightly faster wing beat in flight. Crows are among the most intelligent of birds. They hide food on the beach and use landmarks to find it again. If those landmarks are moved, the crow is unable to find the food.
Crows are great mimics and can learn a great variety of sounds including talking.
The Raven and Crow both belong to the Family Corvidae and are easily told apart in flight. The Raven is about twice as big as the crow with a heavier beak and more pronounced fan or flare to the tail. The Raven's call is also much lower and more throaty. Sexes and juveniles look the same, having all black feathers with black beaks, legs and feet. From a distance, they can be told from other similar-looking birds because they tend to walk, not hop and in flight their wings flap constantly, except in a strong wind.