Cover photo by Gregg Darling. Find the Yellow Presba in the FBIS database (Freshwater Biodiversity Information System) here. Family Synthemistidae Identification Medium-large size Length up to 48mm; Wingspan attains 70mm. The Yellow Presba is easily differentiated from other presba species by the two diagonal yellow stripes on the sides of the thorax. The sexes are … Continue reading Yellow Presba (Syncordulia gracilis)