The Common Raven is frequently heard and seen throughout the western U.S., but being close enough to record one singing from the top of a pine tree is another matter. Because I was so close, you get to hear the full throatiness of the bird's caw. The Common Raven is of course the world's largest passerine (member of Order Passeriformes, the perching birds, aka songbirds). It is therefore not surprising that its voice is so low. Other ravens and crows of Genus Corvus are mostly smaller, with slightly higher voices. But, check out the Thick-billed Raven. To see all the ravens of the world, click the blue "Common Raven" link above.
Nathan Pieplow mentions repeating rhythms as characterizing this species (and not the very similar Chihuahuan Raven), and you can see such a pattern in this performance. A singing raven. Imagine that! And by the way, the background music is provided by a Yellow-breasted Chat.