Agree that they are harder to tell apart. We don't have any records of T. godeffroyi in the ACT. Looking at various other records, including the differences noted here on the last segment in profile: https://australiandragonflies.wordpress.com/2014/01/26/southern-evening-darner-telephlebia-brevicauda-male/ https://australiandragonflies.wordpress.com/2014/01/10/eastern-evening-darner-telephlebia-godeffroyi-male/