I've enjoyed some interesting birds recently. The first was a second-year female Yellow-bellied Sapsucker (Sphyrapicus varius) that was all black and white, missing it's red and yellow. My guess was that the bird was not incorporating any carotenoid pigments into its feathers, but I really don't know much about this sort of thing.
The second interesting bird was this American Crow (Corvus brachyrhynchos) that followed me around in the woods while I was working for an hour and forty-five minutes, and for over half a mile from where it first found me. The video is somewhat long, but pretty interesting. You will need to have the volume up pretty high to hear the odd sounds the crow makes. This video is pretty representative of how the bird was acting around me for most of the time. I was dressed like a hunter, so my hypothesis is that the crow has ended up getting a pile of deer guts from the last person that looked like a hunter, so it thought it would get the same prize if it followed me around. That's just my guess.