I have no idea how many species (or genus, for that matter) of mayfly can be found on, in, and around Fish in a Barrel Pond, but only one gets anglers all aquiver like the Hex. Hexagenia limbata is one of the most geographically widespread mayflies in the United States and in addition to being huge (two inches long or more, including tails) they are known for emerging by the millions, in swarms so thick they show up on weather radar.
Around here, they emerge in numbers closer to the dozens, but a Hex hatch is a Hex hatch and I am constantly being asked if it is on.
A newly-emerged dun on the window is hard to miss and worth a closer look. (more…)