What are the big (14-16) mayflies

[TooeleGuy]

They are not blue wings. Big, black bodies. I only see a few but they have three tails not 2. Anybody know what they are? I thought maybe they were March browns.

[Cary]

where are they and what time have you seen them. March Browns typically frequent fast moving pocket water and emerge in the late afternoon

[TooeleGuy]

I saw them in the deep run above Hoovers Hole around 1:00. Thought it was a blue wing until I saw the real blue wings too.

[cheech]

I saw them in the deep run above Hoovers Hole around 1:00. Thought it was a blue wing until I saw the real blue wings too.

It's the para adams hatch. Killer bugs.

[Stoney Clarke]

It's the para adams hatch. Killer bugs.It may of been the Kilkenheimer hatch as well.

[nativecutt]

wasn't a mayfly it was probably a skwala.

[Curtis Fry]

Yeah, are you sure it was a mayfly? Mayflies have upright wings and look like little sailboats. Stones have longer wings that lay down relatively flat against their bodies.

[TooeleGuy]

I actually found a stonefly with an egg sack yesterday. Pretty cool to find. If I see another one of these bugs tomorrow I will get a picture. Maybe it was a large blue wing. It just didnt look like the other blue wings Ive been seeing. Like I say, it had three tails not just two.

[JayMorr]

wasn't a mayfly it was probably a skwala.

I have seen a few this past week. However they dont have 3 tails ;)


JayMorr

[JayMorr]

It could have been a Mahogany Dun. They are brownish/blackish larger and have 3 tails. I have not seen many of them around but they tend to come off in April. PMDs have 3 tails but you can distinguish them by the color very easily.

You sure it wasnt a Big Ass Midge? :)

PS. The March Brown only has two tails.


JayMorr

[nativecutt]

You are exactly right!!!! It was probably the buffalo midge that's been coming off.

[Taxon]

Tooleguy-

I believe JayMorr has given you the best information by suggesting Mahogany Dun, which would be Paraleptophlebia. My guess would be Dark Blue Quill (Paraleptophlebia heteronea), which has a dark slate colored body.

Roger Rohrbeck
www.FlyfishingEntomology.com (http//:www.FlyfishingEntomology.com)

[Jason B]

I think that you would be suprised how big some of the BWO get. That would be my guess.

[Taxon]

I think that you would be suprised how big some of the BWO get. That would be my guess.

Jason-

The BWOs in Utah are of family Baetidae, and all have only two tails in their winged stages. Only the eastern BWOs of family Ephemerellidae, generally Drunella lata and reclassified synonyms, have three tails in their winged stages.

Roger Rohrbeck
www.FlyfishingEntomology.com (http://www.FlyfishingEntomology.com)

[TS30]

Man, I'm out of my league when you start throwing in the latin! You guys know your stuff, or at least you've convinced me that you do......

[Taxon]

TS30-

When the discussion turns to "what have I got here", it's usually prudent to use the proper scientific names, rather than attempting to use common names for insects. And, this is never more true than when discussing BWOs, as "Bluewinged Olive" appears in the common name of all the following:

Common Name / Scientific Name (previously classified as)
Bluewinged Olive / Acentrella turbida (Pseudocloeon carolina)
Bluewinged Olive / Attenella attenuata
Bluewinged Olive / Attenella attenuata (Ephemerella attenuata)
Bluewinged Olive / Baetis bicaudatus
Bluewinged Olive / Baetis brunneicolor
Bluewinged Olive / Baetis flavistriga (Baetis cingulatus)
Bluewinged Olive / Baetis spp.
Bluewinged Olive / Baetis tricaudatus
Bluewinged Olive / Baetis tricaudatus (Baetis vagans)
Bluewinged Olive / Cloeon spp.
Bluewinged Olive / Drunella flavilinea
Bluewinged Olive / Drunella lata (Ephemerella cornuta)
Bluewinged Olive / Drunella lata (Ephemerella cornutella)
Bluewinged Olive / Drunella lata (Ephemerella depressa)
Bluewinged Olive / Drunella lata (Ephemerella lata)
Bluewinged Olive / Heterocloeon anoka (Pseudocloeon anoka)
Bluewinged Olive / Plauditus dubius (Pseudocloeon dubium)
Bluewinged Olive / Plauditus futilis (Pseudocloeon futile)
Bluewinged Olive / Plauditus punctiventris (Pseudocloeon anoka)
Bluewinged Olive / Procloeon ingens (Cloeon ingens)
Bluewinged Olive / Pseudocloeon spp.
Bluewinged Olive Dun / Acentrella turbida (Acentrella carolina)
Bluewinged Olive Dun / Attenella attenuata
Bluewinged Olive Dun / Baetis spp.
Bluewinged Olive Dun / Centroptilum spp.
Bluewinged Olive Dun / Dannella simplex (Timpanoga simplex)
Bluewinged Olive Dun / Drunella flavilinea
Bluewinged Olive Dun / Drunella lata
Bluewinged Olive Dun / Drunella lata (Drunella cornuta)
Bluewinged Olive Dun / Drunella lata (Drunella cornutella)
Bluewinged Olive Dun / Drunella lata (Drunella longicornis)
Bluewinged Olive Dun / Drunella spp.
Bluewinged Olive Dun / Drunella walkeri
Bluewinged Olive Dun / Ephemerella excrucians
Bluewinged Olive Upright / Ephemerella dorothea dorothea (Ephemerella dorothea)
Large Bluewinged Olive / Drunella lata (Drunella cornuta)
Large Bluewinged Olive / Drunella lata (Drunella cornutella)
Large Bluewinged Olive / Drunella lata (Drunella longicornis)
Large Bluewinged Olive / Drunella walkeri
Light Bluewinged Olive / Drunella lata
Little Bluewinged Olive / Attenella margarita
Little Bluewinged Olive / Baetis spp.
Little Western Bluewinged Olive / Attenella margarita
Minute Bluewinged Olive / Baetis flavistriga
Small Bluewinged Olive / Attenella attenuata
Small Bluewinged Olive / Attenella margarita
Small Bluewinged Olive / Dannella lita (Timpanoga lita)
Small Bluewinged Olive / Dannella simplex (Timpanoga simplex)
Small Bluewinged Olive / Drunella lata
Small Bluewinged Olive / Drunella lata (Drunella cornuta)
Tiny Bluewinged Olive / Baetis spp.
Tiny Bluewinged Olive / Heterocloeon anoka (Pseudocloeon anoka)
Tiny Bluewinged Olive / Plauditus punctiventris (Pseudocloeon anoka)
Tiny Bluewinged Olive / Plauditus punctiventris (Pseudocloeon edmundsi)
Tiny Bluewinged Olive / Procloeon simile (Centroptilum simile)