Cover photo by Diana Russell. Find the Common Hooktail in the FBIS database (Freshwater Biodiversity Information System) here. Family Gomphidae Identification Medium sized Length reaches 50mm; Wingspan up to 62mm. The Common Hooktail is most similar to Paragomphus cognatus (Rock Hooktail) and especially Paragomphus elpidius (Corkscrew Hooktail). It is easily differentiated from Paragomphus cognatus by … Continue reading Common Hooktail (Paragomphus genei)