Cover photo by Jean Hirons. Find the Cape Thorntail in the FBIS database (Freshwater Biodiversity Information System) here. Family Gomphidae Identification Medium-large size Length attains 63mm; Wingspan reaches 72mm. The overall colouration of the Cape Thorntail is yellow and black with some brown shading. In mature males, the black markings develop a dark greyish-blue pruinosity. … Continue reading Cape Thorntail (Ceratogomphus triceraticus)