I like the blue sky and the framing is done well. The bit of OOF part on the lower right could be cloned out. Overall, the little guy is a bit soft. I would suggest more sharpening. I download the image into PS and did USM on a BG copy at 175/.3/0 and the sharpened it up nicely.
Notice the shooting up gave him a rather exaggerated appearance - kind of menacing looking. A method used in movies to make villains more villainous. Get more at his level, if that was possible would be preferable. Keep them coming.
Great light and a beautiful blue sky help this image tremendously. The OOF rock LR is a bit distracting. Great that you got the pika calling. I miss photographing these guys I don't have the chance as often since I moved from Colorado. Well done..