Crows and ravens are both members of the corvid family of birds, which also includes jays and magpies. Both crows and ravens are very intelligent birds, and their similarities can make them hard to tell apart. However, there are some notable differences between the two.
Size: Ravens are much larger than crows. An adult raven can reach up to 27 inches in length and have a wingspan of 4 feet, while a crow only grows to be about 17 inches long with a wingspan of 2.5 feet.
Voice: Crows have a cawing sound that is usually a series of short, loud notes, while ravens have a deeper, throatier croaking sound.
Color: While both crows and ravens are typically black, ravens have a slightly more glossy, blue-purple sheen to their feathers.
Behavior: Ravens are more adventurous than crows, and are more likely to be seen soaring on the wind or performing aerial acrobatics. Crows are more likely to be seen in flocks on the ground or in trees.