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All About Birds: Common Raven – Listen to a raven, learn where you can find them and more.

Audubon: How to Tell a Raven From A Crow – Offers picture and sound comparisons.

Mental Floss: 10 Fascinating Facts About Ravens – In addition to being very smart creatures, ravens like to have fun…find out how with the interesting facts in this article.

Videos

The Valley of the Ravens – The Secrets of Nature

What Is the Difference Between a Raven and a Crow

Smartest Bird (the intelligent raven solves the puzzle)

The Great and Terrible Raven: Its Place in Mythology and Legend | Documentary