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Song Sparrow
The coloring of this sparrow varies greatly across North America, so learning it's song is also a good way to tell it apart from others.
Cooper’s Hawk
"In a study of more than 300 Cooper’s Hawk skeletons, 23 percent showed old, healed-over fractures in the bones of the chest, especially of the furcula, or wishbone." most likely from flying quickly through vegetation to catch other birds. (from allaboutbird.org)