Redshouldered hawk eating bronze frog (according to James Beck, I don't know frogs that well :)
Couldn't get a look at its tail, but it appears to have rufous shoulder patches (most visible in the pictures with white backgrounds).
I've been seeing this hawk on campus for about a week now, perched essentially around the same parking lot each time I see the bird.
Brief description of what you observed
The Red-shouldered Hawk (Buteo lineatus) is a medium-sized hawk. Its breeding range spans eastern North America and along the coast of California and northern to northeastern-central Mexico. Red-shouldered Hawks are permanent residents throughout most of their range, though northern birds do migrate, mostly to central Mexico. The main conservation threat to the widespread species is deforestation.