We hear this bird almost nightly. I used this app to record it’s song to help identify it:

Birdnet sent me to THIS Wikipedia page after identifying the song as being from a Chuck-Will’s-Willow. You can find a recording below the right details column

The Chuck-will’s-willow is often mistaken for the Eastern whip-poor-will which has a similar song.

You can compare the two here:

Chuck-will’s-Willow

Eastern whip-poor-will