The whip poor will is common to North and Central America.

The Whip-poor-will got it's name from it's song which is a loud "whip-poor-will, with an accent on the first and last syllables.

Decades ago, people noticed Whip-poor-wills flying above their livestock at dusk. They thought that they were sucking the goat's milk, when they were actually feeding on the insects around the animals. So they blamed the bird for the goats running dry.

The common Whip-Poor-Will's diet usually consists of flying insects

hope this helps

http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/Whip-poor-will_dtl.html#sound

Sounds like whip-poor-will!