Someone was yelling at me from a very tall poplar tree yesterday. Yelling and yelling, noisy thing. I couldn't see who it was so I got the camera and took some photos so I could have a look. (and then I thought, omg, is this my version of getting a longer arm so I can read the newspaper?)
It's a Northern Flicker, with her nest in the hollowed out poplar. I watched as his/her mate came flying over and then they switched places. Perhaps they're still excavating the nest?
If you click on the photos you can see them a little better.