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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

A beautiful braided reach of the Sag River, with the Philip Smith Mountains in the Arctic National Wildlife Refuge (ANWR) in the background. From the Sagavanirktok River in Alaska

Stream photos

Featured on the forum
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Male Baetis bicaudatus (BWO) Mayfly NymphMale Baetis bicaudatus (BWO) Mayfly Nymph
Dorsal view of a Male Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Chatter Creek in Washington
9 Recently Added Photos
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

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  2. Specimen Discussion, Page 3

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  2. Specimen Discussion, Page 3

You can create new topics in this section from each specimen's page in the insects section.
Topic
Replies
Last Reply
Easier way to get them out of their cases
Jan 14, 2009 by Dgracia in Brachycentrus Caddisfly Pupa
2
Feb 15, 2013
by Troutnut
Grannoms
Apr 26, 2009 by Martinlf in Brachycentrus Caddisfly Pupa
7
Jan 8, 2013
by Martinlf
Not Stenacron
Nov 26, 2006 by GONZO in Male Stenonema modestum Mayfly Dun
2
Dec 14, 2012
by Brookyman
Ecdyonurus nymphs
Dec 11, 2012 by Jmw975 in Ecdyonurus criddlei Mayfly Nymph
0
imitation?
Aug 14, 2009 by Flytyer0423 in Cheumatopsyche Caddisfly Pupa
4
Oct 5, 2012
by Sayfu
Question
Sep 7, 2011 by Flymonster in Female Claassenia sabulosa Stonefly Adult
10
Sep 10, 2012
by PaulRoberts
why the color ?
Jun 26, 2008 by Jordash in Amphipoda Arthropod Adult
12
Sep 4, 2012
by Entoman
Lepidostoma?
Aug 15, 2012 by PaulRoberts in Lepidostoma Caddisfly Larva
2
Aug 16, 2012
by PaulRoberts
chironomids-East versus West
Mar 21, 2008 by Joec in Male Stictochironomus Midge Adult
3
Aug 12, 2012
by Taxon
sedge larva
Oct 10, 2007 by HELENE in Rhyacophila fuscula Caddisfly Larva
4
Aug 9, 2012
by Sayfu
Friday on the South Fork of the Boise
Jul 2, 2012 by Bjorntofish in Pteronarcys californica Stonefly Nymph
0
M. vicarium?
Mar 26, 2012 by Entoman in Stenonema vicarium Mayfly Nymph
8
Jul 2, 2012
by Gutcutter
What size are damselflies?
Jun 28, 2012 by Adirman in Argia Damselfly Nymph
1
Jun 28, 2012
by Entoman
beautiful critter
Jun 21, 2012 by Creno in Male Neoleptophlebia memorialis Mayfly Spinner
0
My First Hendrickson Hatch
May 19, 2012 by MarkP in Male Ephemerella subvaria Mayfly Dun
1
May 22, 2012
by Entoman
Spinner?
May 18, 2012 by Martinlf in Male Neoleptophlebia heteronea Mayfly Spinner
1
May 19, 2012
by Taxon
A mystery late-season Epeorus
Oct 3, 2006 by Troutnut in Male Epeorus frisoni Mayfly Dun
7
May 9, 2012
by Entoman
Anyone know your western Drunella species? [Page: 1, 2]
Jul 19, 2007 by Troutnut in Female Drunella doddsii Mayfly Dun
23
Apr 12, 2012
by Entoman
You all are nuts!
Jun 2, 2009 by VTBob in Male Neoleptophlebia adoptiva Mayfly Dun
17
Apr 10, 2012
by Entoman
Very Nice Photo
Apr 7, 2012 by Taxon in Male Ameletus vernalis Mayfly Spinner
1
Apr 8, 2012
by Troutnut
Psychomyiidae
Mar 19, 2008 by Mlajoie in Philopotamidae Caddisfly Larva
11
Mar 20, 2012
by Entoman
Acroneuria (carolinensis?)
Oct 28, 2008 by GONZO in Female Acroneuria lycorias Stonefly Adult
6
Mar 19, 2012
by Entoman
Slim and Sparse
Mar 18, 2012 by Waxsmith in Calopteryx Damselfly Nymph
0
Acroneuria
Apr 3, 2007 by GONZO in Paragnetina media Stonefly Nymph
3
Mar 11, 2012
by Entoman
Which species is this?
May 18, 2007 by Troutnut in Acroneuria abnormis Stonefly Nymph
4
Mar 11, 2012
by Entoman
Acroneuria specimen moved from genus to species level
Mar 11, 2012 by Entoman in Acroneuria carolinensis Stonefly Nymph
0
Cervical gills
Feb 21, 2009 by Cteas in Prostoia Stonefly Nymph
2
Feb 21, 2012
by Lbrize
mayfly nymph tied fly
Jan 24, 2012 by Dwrbfrear in Hexagenia limbata Mayfly Nymph
1
Jan 24, 2012
by Wbranch
Great Bug Photos
Jan 12, 2012 by Martinlf in Female Ephemerella excrucians Mayfly Dun
2
Jan 13, 2012
by Entoman
insect help [Page: 1, 2]
Apr 7, 2007 by Herefishy in Rhyacophila fuscula Caddisfly Larva
21
Jan 9, 2012
by Entoman
Leptophlebia cupida
Dec 18, 2011 by Martinus in Female Leptophlebia cupida Mayfly Spinner
3
Dec 19, 2011
by PaulRoberts
Leptophlebia cupida
Dec 18, 2011 by Martinus in Female Leptophlebia cupida Mayfly Spinner
0
Family
Nov 29, 2006 by DMM in Cambaridae Crayfish Juvenile
6
Nov 22, 2011
by Entoman
Arcynopteryx
Jul 7, 2006 by Taxon in Isogenoides hansoni Stonefly Nymph
3
Nov 9, 2011
by Entoman
this video is fascinating!
Oct 22, 2011 by Creno in Phryganeidae Caddisfly Larva
15
Oct 26, 2011
by Oldredbarn
Acerpenna?
Oct 25, 2011 by Entoman in Male Baetis Mayfly Dun
0
locality
Oct 21, 2011 by Creno in Female Brachycentrus americanus Caddisfly Adult
2
Oct 21, 2011
by Troutnut
Nice Photos
Sep 23, 2011 by Oldredbarn in Male Cinygmula ramaleyi Mayfly Spinner
0
Maybe Epeorus
Jul 5, 2006 by Troutnut in Male Afghanurus inconspicua Mayfly Dun
16
Sep 22, 2011
by Oldredbarn
Water mite
Sep 19, 2011 by Yann in Arachnida Arthropod Adult
1
Sep 19, 2011
by Jmd123
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