Sunny August isn’t exactly the peak season for mayfly hatches, but some interesting species show themselves.

Timpanoga is a member of the family Ephemerellidae, but the nymphs are flat like clinger nymphs of the family Heptageniidae. Large operculate gills on the abdomen keep silt off of the remaining smaller gills. They are also large with mature nymphs roughly 3/4 of an inch long.

The chance to get photos of Timpanoga spinners eluded us for decades until this spinner came to us!

Besides three tails, large size, and brownish-red color, Timpanoga duns and spinners have small remnants of the nymph's gills, barely visible in this photo.

You can’t go wrong on a cool mountain stream on a hot August day.  Especially when the stream holds a good number of trout.

We never saw a Timpanoga dun or spinner on the water, but the trout were happy to take large dry flies. Whether the trout mistook them for a mayfly or a terrestrial we didn’t know, and to be honest didn’t care.

Don’t move - Now smile!