Invented by Roger Eddy in 1952 in honor of the National Audubon Society, this nifty little bird call is a clever yet simple bit of genius. It's a small birchwood cylinder with a cast-metal key/plug that you twist back and forth to create chirping noises that may attract curious birds nearby.

Hear it in action:

It's a pretty cool little tool for birding purposes, and every one of them is made and tuned by hand here in the US. Just don't use it near nesting areas please, we don't wanna stress the birds out for the sake of a hobby.

This bird call is $12 on Amazon. A small capsule of powdered rosin is included to renew the call's “voice” as needed later on.