Great Speckled Spinners
This common name refers to only one species.
These are often called Great Speckled Spinners.
Sadly, the largest mayflies
of the early season come in small quantities. Siphloplecton basale
matches the impressive size of the Ephemera
drakes which follow two months later, but it does not match their numbers. It is common on one of my favorite rivers to see ten to fifteen of these elegant drakes dancing over a riffle in the early Spring. They are difficult to miss in the air, but on the water that quantity cannot get the trout or the angler excited.
There are rumors of fishable Siphloplecton
days, but I know none of the details. They might be locally important in places angler-entomologists have yet to visit in the prime months, an unsung local treasure like Baetisca laurentina