What is this bird from only its call, it torments me?

Maybe have to turn it up all the way

A month ago I went backpacking and as soon as I drifted off to sleep these birds started going off like an alarm. Not even constantly, so I can get used to it, but intermittently so I kept waking up.

Now I'm in the same state park backpacking again, several miles from the last place but there's still a bunch of them. This time I came prepared with ear plugs with this bird is seriously becoming my enemy. Every other bird is happy to make noise in the daytime. I went looking with my flashlight because I could tell one was in a specific stand of trees but I am too tired from hiking to do much fricking around in dense stands of trees right now. Somehow tonight I'm in a lucky area for service and I can ask rDrama