May 24, 2020 — Ozaukee County
The Ozaukee Washington Land Trust's Cedarburg Environmental Study site (CESA). Northwest corner of Hwy Y and Western Ave.
Common Green Darner (Anax junius)
I showed this picture to Bob DuBois, who thinks it might be in the Enallagma boreale/vernale/annexum group and suggested reporting it as E. vernale. He said that females in this group are not distinguishable in photographs. No males were observed or examined. Note from RBD: females in this group usually have large pale marks on top of S8. The vernale form (or an intergrade) is more likely than either annexum or boreale to be entirely dark on top of S8 as this one is. Vernale is underrepresented in this database. Because of intergrades and ID difficulty, most records have been lumped with annexum. So, even though the ID of this female is uncertain, I suggested that it be submitted as vernale because that is probably what it is, and observers could possibly return to the site to confirm the ID with male specimens.