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.

Stream photos

Featured on the forum

Re: Trico emergers
In the Mayfly Genus Tricorythodes by Bwoklink (Martinlf replied)

Re: Trico Tips
In the Mayfly Genus Tricorythodes by Martinlf

Re: UV spectrum and trout
In General Discussion by Martinlf

Re: closing the gender gap in flyfishing
In General Discussion by Konchu (Smallflyguy replied)

Re: Fishing Kupa River, Slovenia
In Fishing Reports by Slocum (Fish1 replied)

Tricorythodes (Trico) Mayfly Nymph Tricorythodes (Trico) Mayfly Nymph

Dorsal view of a Tricorythodes (Leptohyphidae) (Trico) Mayfly Nymph from Mystery Creek #308 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.

Discuss Animalia

You can create new topics in this section from each hatch's page in the insect section.

Topic

Replies

Last Reply

Possible ID
Apr 11, 2021 by Sreyadig in species Apobaetis futilis

Apr 11, 2021
by Taxon

Yea...
Oct 23, 2020 by Imaxfli in species Ephoron leukon

Trico emergers Featured Topic
Jul 14, 2018 by Bwoklink in genus Tricorythodes

Sep 11, 2020
by Martinlf

PMD Spinner - Egg sack color? [Page: 1, 2]
Jan 26, 2010 by Wbranch in species Ephemerella excrucians

Aug 18, 2020
by Troutnut

Trico Tips [Page: 1, 2, 3] Featured Topic
Jul 21, 2007 by Martinlf in genus Tricorythodes

Jul 31, 2020
by Martinlf

Glossosoma intermedium or nigrior
Jun 30, 2020 by Wiflyfisher in genus Glossosoma

Jul 31, 2020
by Creno

Tiny Black Caddis hatch, late fall - Nov 26 to be exact_ Spring Creek Southern MO [Page: 1, 2]
Dec 29, 2010 by Dai_sca in family Hydroptilidae

Dec 10, 2019
by Pdcox

Best time of year to harvest hellgramites
Jun 27, 2008 by Rblouser in family Corydalidae

Jun 11, 2019
by Sapperstyle

Differences I'm dying to know about
Jul 8, 2018 by Reify in genus Tricorythodes

Jul 9, 2018
by Martinlf

Little Black Stonefly pics
Apr 14, 2018 by Adirman in species Allocapnia granulata

Apr 21, 2018
by Martinlf

Emerger pictures anyone???
Mar 30, 2010 by Hellgie in genus Chimarra

Apr 9, 2018
by Gazzer

getting midges down
Dec 8, 2007 by CaseyP in family Chironomidae

Jan 17, 2018
by Ummm

Mayfiles other than Callibaetis
Jan 15, 2018 by Royal_Coach in genus Callibaetis

Jan 15, 2018
by Millcreek

Polymitarcyidae Question
Jun 22, 2017 by Steamntrout in species Ephoron album

Jun 22, 2017
by Crepuscular

Steamntrout
Jun 14, 2017 by Steamntrout in species Leptophlebia nebulosa

Clinger nymphs are shaped that way to hang in really fast currents. Really? Featured Topic
Feb 23, 2013 by Entoman in genus Rhithrogena

Jun 14, 2017
by Steamntrout

High Water
Apr 13, 2007 by Dbar in species Pteronarcys californica

Jun 11, 2017
by Ricofreako

Grannom vs Apple Caddis
Apr 26, 2010 by Walleye in order Trichoptera

Jan 10, 2017
by Afishinado

Brachycentrus americanus on the Lower Sacramento River California
Oct 29, 2016 by Troutguide in species Brachycentrus americanus

Hex hatch water temperature range?
May 23, 2014 by NEMatt in species Hexagenia limbata

Jul 5, 2016
by Bombillo

What is the big DEAL about the HEX? [Page: 1, 2]
Jun 21, 2006 by Spinner in species Hexagenia limbata

Jul 5, 2016
by Bombillo

Salmonfly question for you westerners
Jul 30, 2006 by Troutnut in species Pteronarcys californica

Jun 4, 2016
by Chipper

Arctopsyche grandis in waterton canyon
May 16, 2016 by Krikut in species Arctopsyche grandis

May 17, 2016
by Bnorikane

grannom caddis [Page: 1, 2, 3] Featured Topic
Sep 26, 2006 by Goose in genus Brachycentrus

Feb 1, 2016
by Martinlf

Fly choice during an Ephoron hatch
Aug 3, 2007 by Jmd123 in genus Ephoron

Jan 31, 2016
by Martinlf

Caddis Pupae Question [Page: 1, 2, 3] Featured Topic
Dec 6, 2010 by PaulRoberts in order Trichoptera

Nov 23, 2015
by Martinlf

Clusters of midges and the Griffith's Gnat [Page: 1, 2]
Apr 10, 2007 by Troutnut in family Chironomidae

May 22, 2015
by Taxon

ovipositing?
Mar 4, 2015 by Btopbuckeye in genus Chimarra

Mar 6, 2015
by Crepuscular

rotunda
Jan 25, 2015 by CharlieBugs in species Ephemerella invaria

Feb 1, 2015
by Gutcutter

Midges
Oct 24, 2006 by Goose in family Chironomidae

Jan 14, 2015
by Martinlf

Thank you for the nice quality pictures.
Sep 22, 2014 by Mushroom in family Simuliidae

Sep 23, 2014
by Troutnut

Polycentropodidae or?
Oct 1, 2013 by LowBudget in family Polycentropodidae

Jul 24, 2014
by Crepuscular

Arctopsyche Grandis
Jul 2, 2014 by Epeorus in genus Arctopsyche

Jul 6, 2014
by Entoman

So is Ep Infrequens now known as Ep Dorothea? [Page: 1, 2]
Feb 17, 2008 by Wbranch in species Ephemerella dorothea infrequens

Jul 1, 2014
by Crepuscular

Predicting a hatch?
Apr 2, 2008 by U2ill in order Ephemeroptera

Jun 24, 2014
by TNEAL

Moved from genus level to N. albida
Jun 15, 2014 by Entoman in species Nectopsyche albida

Green Drake Hatch Temp?
May 23, 2014 by NEMatt in species Ephemera guttulata

May 23, 2014
by Entoman

Mayfly larvae -wigglers preservation as bait [Page: 1, 2]
Jun 2, 2007 by Teacherprea in species Hexagenia limbata

Apr 29, 2014
by TNEAL

Drunella cornuta on the Brodhead at Stroudsburg PA
Apr 21, 2014 by Reify in species Drunella cornuta

Apr 24, 2014
by Brookyman

Life cycles and hatches
Mar 7, 2014 by Leahdanger in family Chironomidae

Mar 9, 2014
by Entoman

Blue-winged OlivesBaetis

Troutnut Forum › Fly Hatch Talk > Discuss Animalia