Ok, they're not partridges, and they're not in peartrees. They are Ruffed Grouse (which are distantly related to partridges).
I was hiking up a small mountain yesterday, and I wasn't expecting much opportunity for photos, but on my way back down I looked up and spotted these two characters just perched in a small tree directly above the trail. The interesting thing about interior Alaska is that in the winter there are very often temperature inversions in place. So that day it was -6 F when I started hiking, and because of the inversion, it got noticeably warmer when I began climbing the mountain (it was more of a really big hill). You can tell whether or not its below 0 F if your eyes start tearing up from the dryness and said tears freeze on your face.
If you could zoom in close to these images, you'd notice that they are definitely not sharp; that's because it was 40 minutes after sunset when I took these shots! So given the appallingly poor light, I'm quite pleased with them.
All shots at 400mm, F5.6, ISO 6400