Red-shouldered hawk (?)

This hawk was spotted on the Colorado College campus on Saturday, a very pleasant, warm day in contrast to frigid, icy Friday. It looked like a red-shouldered hawk, and it sounded like a red-shouldered hawk (that is to say, it sounded like a dog's "squeaky toy"), but there aren't supposed to be any red-shouldered hawks around these parts, especially in winter! Per Wikipedia, "Eastern [red-shouldered hawk] population winters from s. Wisconsin, Oklahoma, Ohio and s. New England south to Gulf Coast; occasionally throughout breeding range. In winter, reported south to Jalisco, state of México, and Veracruz, Mexico. Western population largely non-migratory. Throughout its winter range, this species avoids higher elevations. [Emphasis mine.] Eastern birds occasionally wander west (e.g., Colorado, Kansas, West Texas, Manitoba, North Dakota) in migration; Western birds have strayed east to Arizona, Nevada, Idaho, and Utah, and north to Washington."

So maybe this is an eastern red-shouldered hawk that wandered into high elevation Colorado in the middle of winter, which makes it a very rare sight indeed! And I would say he was cute, but he was really giving me the stink-eye when I was taking his picture, so maybe he didn't like me much ;^)