Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > Unknown mayfly?

Braindead has attached this picture to aid in identification. The message is below.
View Full SizeView Full Size (5.3X larger)
BraindeadAugust 9th, 2013, 3:34 pm
Niwot, Colorado

Posts: 2
Greetings from Colorado. I'm a new member of the troutnut site and have a question of those knowledgeable about mayflies. Earlier this year I had the privilege of getting to fish a private lake up near Estes Park, Colorado. I fished with 4 other friends from canoe, row boat and yes even a paddle boat. Near the end of our morning, a mayfly landed on my little finger and I managed to get a quick snapshot of it (attached).

Any idea what this little critter is? I've looked around this and a few other sites but can't positively identify it.


Chester Shans
TaxonAugust 9th, 2013, 7:05 pm
Site Editor
Plano, TX

Posts: 1289
Hi Chester-

Welcome to the troutnut forum. The mayfly on your finger in the attached photo is a male imago (spinner) of genus Callibaetis, probably Callibaetis ferrugineus hageni.
Roger Rohrbeck
EntomanAugust 9th, 2013, 8:10 pm
Site Editor
Northern CA & ID

Posts: 2604
I agree.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
BraindeadAugust 9th, 2013, 10:22 pm
Niwot, Colorado

Posts: 2
Thanks much for the speedy reply. My fly fishing friends and I appreciate the quick answer.

TaxonAugust 9th, 2013, 11:06 pm
Site Editor
Plano, TX

Posts: 1289
You are certainly welcome, Chester. It was our pleasure to be able to help you and your fly fishing friends.
Roger Rohrbeck

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.

Related Discussions

TitleRepliesLast Reply
Re: Favorite fly to tie
In Fly Tying by David82nd
9Nov 21, 2017
by Jmd123
Re: Need help identifying!!
In the Identify This! Board by Jsawatzky
5Jul 5, 2015
by Creno
Re: How's everyone's time on the river going
In General Discussion by David82nd
7May 29, 2017
by Wbranch
Re: Arctopsyche grandis in waterton canyon
In the Caddisfly Species Arctopsyche grandis by Krikut
1May 17, 2016
by Bnorikane
Up-to-date with the latest mayfly species
In General Discussion by Troutnut
Re: Sexy Shad Clouser Minnow
In Fly Tying by Mcflyangler
1Jun 10, 2016
by Wbranch
Re: Fall colors
In General Discussion by Troutnut
1Oct 19, 2006
by Shawnny3
Re: Beatis or Calebeatis ??
In Beginner Help by Damsel
1May 26, 2018
by Taxon
Re: Link to pictures of H. culacantha
In the Mayfly Species Heptagenia culacantha by Troutnut
2Oct 4, 2007
by Troutnut
Re: PA contingent
In General Discussion by Wbranch
49Apr 26, 2008
by Brooklover
Most Recent Posts
Re: Need a little help with waders unrelated to fishing
In General Discussion by NoQuarter (RleeP replied)
Re: What in the world are these things ?
In the Identify This! Board by Tuckcast
identifying flies in my tackle box
In Beginner Help by Wadevcamp
Re: Big Deep Blue Lake
In Beginner Help by Baron (Jmd123 replied)
Re: Phantom Crane Fly MI
In General Discussion by Brian314 (Jmd123 replied)
Re: Joan Marie DeNike, 1933-2019
In General Discussion by Jmd123 (Iasgair replied)
Re: Au Sable Holy Waters Sulphurs
In General Discussion by Brian314
Re: Lifestage
In Male Ephemera simulans Mayfly Dun by Taxon (Troutnut replied)
Re: Parachutes
In Fly Tying by Wbranch (Strmanglr replied)
Re: Pennsylvania Pickerel
In General Discussion by Baron