Large (size 10 or so), brown/mahogany body, clear wings, reddish eyes with stripe in middle (this seems a distinguishing characteristic of Isonychia). 2 tails. Imago. Surprised to see this genus on this river.
Small (size 18 - 22). There seems to be a range of sizes, but I only caught this one to examine closely. Dull yellow body, grey wings. This one is probably a female, eyes are rather small. 3 tails. Identified by Mike Cole under magnification.
Small dark caddis. Ubiquitous on this and other area streams through much of the summer.
pale yellow body, greyish-white wings (dun - spinner wings translucent), about a size 18 or 20; a little larger than I would have thought this late in the year. Dark orange eyes (dark brown lower portion of eyes) in the dun. 3 tails.
Note that these photos show 2 different individuals - one dun , one spinner - which I believe to be the same species. I save a specimen of the spinner.
Black wings, dark body, characteristic hairy palps, flying just above water surface. About a size 18 or maybe 20.
Found two underneath rockm one approximately 3.0 cm SVL, one approximately 5.0 cm SVL. No photos.
Small: 4-5 mm. Yellow body, 3 tails, eyes dark orange on top, dark brown below.
Small (5-6 mm) black caddis dancing just above the water. Did not get a picture or specimen.
Some scattered hatches of sulfurs beginning at 8:00. Scattered rises, mostly trout sipping midges and emergers.
Sulfur spinner c. 9mm caught in spider web 7:00
These are Ephemerella invaria, not E. dorothea. Both can be on this river this time of year. These 2 specimens were 8-9mm, a bit larger than dorothea usually get. Note these are two different individuals - a male dun and a female spinner - but both are invaria. Later identified under magnification by Mike Cole. 3 tails, yellow/olive or yellow/brown body. These two photos were both taken the next morning, after each had spent the night my refrigerator. See earlier photo of the dun, taken a few minutes after capture, which shows a much more yellow body color.
Quabbin Reservoir Swift River Trail
Looks like a dicerca, but not sure on the species
Found at Quabbin Reservoir
This is a photo of the bottom of the fly
A two tail dark mayfly spinner. This is a medium size female spinner with clear wings. It was in an open cooler that had water in it near a light.
Reddish brown body, a touch of yellow. Grey wings. Note the projecting bump on leading edge of hind wing. 3 tails ,striped, reddish brown.
Decent size (14b or so), dark body. 3 tails. Hind wing has smoothly angled front edge, which is in contrast to the other large dark mayfly likely this time of year. Female (small eyes).
Identified by Mike Cole under magnification.
Small, olive body. Probably a baetidae, but can't tell for sure how many tails. I think I still have the specimen, will check on this.
Dirty yellow, some darker markings. Size 14 or 16?
ID'd under magnification by Mike Cole.
Specimen very damaged, can't determine # of tails. Hind wing small, not minute. Male (can see claspers) imago size 22-24.
Size 24 or so, yellowish body. Tails broken, can't tell how many. Double interalary veins. Minute hind wings, sharp costal projection. Got really beat up. Looks like Baetidae from same area, similar dates.
Male. Specimen in poor condition, no tails visible.
Don't see any intercalary veins.Size 22 or so. 1 male, 1 female Dun.
1 female, 1 male dun.