Deep in the mountains of Greece, the country's most-wanted man has been on the run for over a decade.

He's a bank robber, a kid napper, but to many Greeks, he's a hero.

His name is Vasili Spaliokostas, and we're on the trail of the man behind the men, a modern-day Robin Hood

who steals from the rich and gives to the poor.

A Miles Gray, listen to the Good Thief on the iHeartRadio app Apple podcasts or wherever you get your podcasts.

Welcome to Brain Stuff, a production of iHeartRadio.

Hey, Brain Stuff, Lauren Volgobom here.

It takes an eye for small details to be a good bird watcher.

And that's certainly the case when it comes to identifying Ravens vs. Crows.

Though once you know what you're looking for, it's pretty easy.

Altogether, there are more than 30 different species of crows and Ravens worldwide,

and they're all part of the genus Corvus, which includes other black birds like jackdaws and rooks.

And many of these bear a passing resemblance to each other,

but these slight differences in their feathers, vocalizations, and behaviors

are just a few of the ways that you can tell these two birds apart.

Now, instead of comparing the key traits of every single Raven and Crows species on Earth,

we'll just focus on two species from North America today,

the common Raven and the American Crow.

Let's begin with relative size.

A Raven is noticeably bigger than a Crow.

It has a greater wingspan that can be almost four feet or over a meter in total length,

while the distance between the beak tip and tail tip can be over two feet,

...