We’re excited. They’ve been returning in waves over the last few days.

The sandhill cranes are back.

I remember reading somewhere that they are one of the loudest, if not the loudest bird species.

Here’s what we’ve been listening to:

This is their unison call. Unison calls are produced by a pair of birds. This call, performed with the birds standing close to each other and in a synchronized duet, is a way of reinforcing the pair bond between a female and a male bird. It may also be used by a pair to threaten predators or other cranes.