Angling-insect
Guides
Ephoron album
Say's Burrowing White Mayfly, White Fly
Ephoron album is a burrowing mayfly native to eastern and central North America, notable for synchronized mass emergences ('superhatches') involving millions of individuals in late summer evenings. Adults have pale milky-white wings and live less than 24 hours without feeding. Nymphs inhabit silty riverbeds and develop for several months to one year before emergence. The species was first described by Thomas Say in 1823 during the Long expedition to the Mississippi headwaters.
Isonychia arida
arid howdy mayfly
Isonychia arida is a species of brushlegged mayfly in the family Isonychiidae. It was described by Thomas Say in 1839, originally as Baetis arida. The species is found in North America and is known by the common name "arid howdy mayfly." Like other members of the genus Isonychia, it belongs to a group commonly referred to as "slate drakes" by anglers.