Mystery mystery

field recording There was a young Peregrine Falcon tucked away near the top of a Redwood tree where this call was coming from, however I could not see the bird making the call. This was on a city street near an egret and heron rookery. We observed the Peregrine Falcon fly in to the tree where it stayed put for over an hour. This call came shortly after a few crows started flying near the same Redwood tree. . . Does anybody know if this is a Peregrine calling?; playback used:no