Cooper's Hawks and Sharp-shinned Hawks are similar birds, and often give birders a hard time when it comes to distinguish them in the field. This handy guide from Birdorable is great for birders because it points out some of the different field marks that can be used to tell the two apart in the field. Since neither species is named in this original design, it's truely made for real birders. (In case you're not sure, that's a Sharpie on the left, and a Coop on the right. Right?)