Dead of unknown cause but no visible signs of external injury; on rock barren, 6cm SVL
Currently in communication with both Ontario Turtle Conservation Centre and Toronto Wildlife Centre to determine the best course of action. Currently it is in my care.
Update: Handed over to Toronto Wildlife Centre.
Frame grabs from a video. Need ID help - Cooper's? RS?. Bird was rather incompetently going after a squirrel, which seemed amused rather than afraid but was dodging feints by the bird.