[Larry-54]

And wouldn't you know -- around Halloween time!

This is a kind of croaking, grunting, or grumbling sound coming from from a fairly specific place in the wall of an upstairs room in an older two-story wood frame house.

I've pretty much eliminated wind, passing traffic, and other external sources. It's intermittent, not regular timing, and often absent for several hours at a time.

I think insects would be continuous, so if it's alive, I would guess a squirrel or a mouse. We've had mice, but they usually sound like they're busy scurrying about, not hanging out and grunting.

It sounds like a metal ornament or gutter drain rubbing against the house in the wind -- however, as I've said, I'm almost certain it isn't external to the house.

d-CON pellets have worked with mice before, so I've placed them in the attic.

Any idea what would cause this type of noise? Thanks!

[Larry-54]

From what I've discovered so far, the description fits "carpenter bees" although I've never heard of them before, and to my knowledge they're not a common pest here (in New England).

We've had carpenter ants, but those are something quite different, and they were (so far) completely eliminated by a pest control company.

Any comments would be appreciated. I plan to call the pro's tomorrow.