Whereas some dragonflies seem aptly named, others have common names that make me wonder. For example, how does one count the spots on this Four-spotted Skimmer (Libellula quadrimaculata)? I see four black stigmas and four small black mid-wing spots, along with black and amber patches at the base of the wings.
A little research suggests that the notable spots are the ones at the middle of each wing's leading edge. I took these photos on 8 Jun 2016 in Wells, ME.