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Welcome to Science Talk, the weekly podcast of Scientific American, for the seven days starting April 11th.

I'm Steve Murski.

This week on the podcast, The Forensics of Photos and Bird Brains.

We'll talk with animal behavior expert, Bern'd Heinrich, about Raven Intelligence,

and a couple of researchers from Adobe Systems will discuss forensic photography,

methods in development to root out image manipulation. Plus, we'll test your knowledge about some

recent science in the news. First up, Berndt Heinrich, he's a professor of biology at the University

of Vermont. He's written seven articles for Scientific American. The latest, co-authored by Thomas Bukniar, is in the April

issue and is called Just How Smart Are Ravens. I called Heinrich at his office in Burlington, Vermont.

Hi, Dr. Heinrich. How are you today? Fine. Thank you, Steve. Tell me, first of all, all ravens are

crows, but not all crows are ravens.

Is that right?

Yeah, I mean, ravens are a select group of crows, generally larger birds.

And, you know, the raven that we're talking about here is Corvus Korax, which is the V-raven that most people think of.

It's all over the northern hemisphere, Asia, Europe, North America, and down to South America.

So it's huge distribution.

But, for example, in the New York metropolitan area, if I see a large black bird on a telephone pole is

...