BINGO!! We just found it in the bird book. I'd never heard of it before. How did you find it so fast? https://www.allaboutbirds.org/guide/Brown_Creeper/id

See THIS POST. tj

Would like ID of baby bird downstate NY

No sighting, but both my brother & I in rural settings have recently (so it's resident, not migratory) heard this bird just as getting dark or dark. It's loud & goes in an increasing rate: Owwww...............owwww...........owwww.........owww........oww.......oww......oww.....oww....oww...ow..ow.ow.ow.ow.ow. Almost certain it's not any species of owl or grouse. Seems to come from near ground level.