Squeaking sound

I went down to my basement today, I was down there day before last, and I noticed a squeaking sound (almost like a bird chirping) the lights were on and I couldn’t see anything out of the ordinary. I went back down about an hour later turned the lights on again, same thing noticed nothing but the sound. I decided to check again a half hour later but leave the lights off and same sound and I just turned my tv off to go up to bed and now I can hear the sound from the top of the stairs. So what would squeak for hours on end? Edmonton

Squeaking sound: Unless you can pinpoint the source, it likely will remain a mystery. Crickets excepted, the only home-infesting insects capable of making a sound audible to humans that I know of are the larvae of old house borers – Click here for details.