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This is CBS Eye on the World with John Batchelor. Here's John Bachelor.

Continuing with the author and producer, Stephen Moss, his new book is Ten Birds that Change the World. And now we turn to a raven. I have never seen a raven. I have crows in my life, and I respect them. A raven is

much bigger. Also, same cleverness, same intelligence, and the legends. Stephen, a very good evening to you to continue

with the raven. You've seen the raven in the Tower of London. I want to start there because

that's part of my association. The Tower of London, it's impossible to avoid it if you read English

and American history. The raven is a very large bird and I take it

it has something of the aura of mythology around him. You've met a raven and he makes a strange

sound. So please explain how big and what the sound is and what you thought when you met a raven?

Ravens are like a crow on steroids. I mean, they're considerably bigger. They're about the same

size as a hawk, a buzzard, you know, red-tailed hawk, that sort of size. You know, they're a big bird,

and they have this very loud, deep call. So they sort of go, gr, gr, it's where they get their name, actually.

It's an omnipatioch name.

It's from an old Norse word grafen.

...