Cover photo by Gerhard Diedericks. Find the Keyhole Glider in the FBIS database (Freshwater Biodiversity Information System) here. Family Libellulidae Identification Medium sized Length up to 50mm; Wingspan attains 93mm. The Keyhole Glider most resembles Tramea limbata (Ferruginous Glider). That species is similar in both size and shape but has narrower, darker markings at the … Continue reading Keyhole Glider (Tramea basilaris)