So my thought is, like, how? Like, how do you differentiate so many bird songs?

Well, learning from a young age definitely helped.

I am 22 years old.

I've been birding ever since I was five.

My mother's friend sent us a bunch of Birding By Ear CDs and a bird book, and I would just sit there and listen to those CDs for hours and hours and hours.

I think the CDs that I grew up with, I think that had 150 birds, and it would told you how to identify them by sound.

There are mnemonic devices that you can use.

[laughs]