Mystery bird sounds

I've been trying to get these posted for a while but have had technical difficulties. Please put your birdy ears on and help if you can. Thanks!

I've heard three birds/sounds lately which I cannot identify. Here is the first one, heard yesterday by Penns Creek. The bird was rather plain, with light/white front and gray back and wings--I didn't see any distinguishing field marks, due to the bad light and quick view. Here's the call:

Wait a second.... Is that a veery? It is, isn't it?

Okay--the other two. First, a recording of the chock sound I heard a few weeks ago at the Coburn rail trail:

Second, another mystery sound, recorded that same day by the creek at the Coburn rail trail: