Cover photo by Gregg Darling. Find the Silhouette Dropwing in the FBIS database (Freshwater Biodiversity Information System) here. Family Libellulidae Identification Small size Length up to 43mm; Wingspan attains 68mm. The Silhouette Dropwing is a slender, dark blue species. The thin abdomen easily differentiates it from other dark blue dropwings like Trithemis furva (Navy Dropwing) … Continue reading Silhouette Dropwing (Trithemis hecate)