Bob Power notes: "Great study bird. Why isn't this a Swainson's? Sub-terminal tail band too thick and black. Trailing edge of the wing curves down and out as it leaves the body. Swainson's leaves the body in pretty much a straight line. Flight feathers are dark, but not all the way through the secondaries. Swainson's would be darker. Hood is a fooler, but Swainson's hood comes down fairly far into the chest. Not so on this pretty little White-tailed Hawk."

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