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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Here Oksrukuyik Creek flows away from the Dalton Highway toward the pipeline. It eventually grows into one of the major rivers of the North Slope, and the main drainage to the west of the Sag, but where it crosses the road it's just a small grayling stream. From Oksrukuyik Creek in Alaska

Stream photos

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Clostoeca disjuncta (Northern Caddisfly) Caddisfly LarvaClostoeca disjuncta (Northern Caddisfly) Caddisfly Larva
Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
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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.
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Forum Posts By Millcreek

Forum Posts By Millcreek

Topic
Replies
Last Reply
Re: Baetis bicaudatus
In Male Baetis tricaudatus Mayfly Spinner by Taxon
12
Nov 12, 2020
by Millcreek
Re: Ephemerella tibialis
In Male Serratella micheneri Mayfly Nymph by Millcreek
2
Dec 26, 2019
by Millcreek
Re: Puzzled on this mayfly, not even confident on family
In Male Rhithrogena hageni Mayfly Spinner by Troutnut
1
Jul 23, 2019
by Millcreek
Re: Hesperoperla or Calineuria
In Male Calineuria californica Stonefly Adult by Millcreek
2
Jul 22, 2019
by Millcreek
Neoleptophlebia
In Neoleptophlebia Mayfly Nymph by Millcreek
0
Jul 19, 2019
by Millcreek
Neoleptoptphlebia
In Neoleptophlebia Mayfly Nymph by Millcreek
0
Jul 19, 2019
by Millcreek
Neoleptophlebia
In Neoleptophlebia Mayfly Nymph by Millcreek
0
Jul 19, 2019
by Millcreek
Hesperoperla pacifica
In Hesperoperla pacifica Stonefly Nymph by Millcreek
0
Jul 19, 2019
by Millcreek
Re: Lake Invertebrate ID help
In the Identify This! Board by ADKbrookie
5
Apr 23, 2018
by Millcreek
Isoperla marmorata and Taenionema pacificum Isoperla marmorata Isoperla marmorata Taenionema pacificum Taenionema pacificum
In the Identify This! Board by Millcreek
0
Feb 21, 2018
by Millcreek
Re: Mayfiles other than Callibaetis
In the Mayfly Genus Callibaetis by Royal_Coach
1
Jan 15, 2018
by Millcreek
Re: I think I know, but want verification
In the Identify This! Board by Byhaugh
3
Jul 13, 2017
by Millcreek
Suwallia sp.
In the Photography Board by Millcreek
0
Jun 9, 2017
by Millcreek
Re: Kogotus / Rickera and Isoperla mormona pictures
In the Photography Board by Millcreek
4
May 11, 2017
by Millcreek
Re: Dytiscidae sp.
In the Identify This! Board by Millcreek
2
Jul 19, 2016
by Millcreek
Re: Pteronarcys californica nymph Taken from Russian River. Dec. 24th, 2015. 25 mm. Taken from Russian River. Dec. 24th, 2015. 25 mm. Taken from Russian River. June 17, 2013. 30 mm. Taken from Russian River. June 17, 2013. 30 mm.
In the Photography Board by Millcreek
2
Jun 14, 2016
by Millcreek
Re: Cool grayling spawning video
In General Discussion by Troutnut
1
Apr 28, 2016
by Millcreek
Paraleptophlebia sp.
+ 2
Male (upper portion) and female (lower portion) Female Female Male Female and male
In the Photography Board by Millcreek
0
Apr 6, 2016
by Millcreek
Re: Mayfly swarm
In General Discussion by Millcreek
8
Apr 5, 2016
by Millcreek
Re: Fallceon species mating
In General Discussion by Millcreek
7
Dec 1, 2015
by Millcreek
Re: Marilia cases and pupae Cases about 9 mm. Pupae about 7-8 mm.
In the Identify This! Board by Millcreek
3
Nov 24, 2015
by Millcreek
Re: Water striders
In General Discussion by Namfos
1
Nov 19, 2015
by Millcreek
Re: Rhyacophila spp. Rhyacophila hyalinata group. 12 mm. Rhyacophila betteni group. 13 mm. Rhyacophila betteni group. 14 mm. Rhyacophila betteni group. 14 mm.
In the Identify This! Board by Millcreek
2
Oct 24, 2015
by Millcreek
Paracloeodes minutus Labium Male 3.5 mm, excluding cerci. Female 4mm, excluding cerci. Male 3.5 mm, excluding cerci.
In the Photography Board by Millcreek
0
Sep 17, 2015
by Millcreek
Re: Pterophoridae to identify
In the Identify This! Board by Pilonm
1
Aug 30, 2015
by Millcreek
Re: Stonefly identification
In the Identify This! Board by Uppersac
20
Jul 22, 2015
by Millcreek
Re: Agapetus larva and pupa
+ 8
Agapetus larva. 5 mm. In alcohol. Collected March 29, 2013. Larval case. Dorsal view. 7 mm. In alcohol. Collected March 29, 2013. Larval case. Ventral view. 7 mm. In alcohol. Collected March 29, 2013. Case of prepupa. 8 mm. In alcohol. Collected March 29, 2013. Prepupa in case. Case 8mm. Prepupa 6 mm. In alcohol. Collected March 29, 2013.
In the Photography Board by Millcreek
6
Jul 7, 2015
by Millcreek
Re: Oecetis sp. larvae and pupae
+ 3

In the Identify This! Board by Millcreek
9
Jul 7, 2015
by Millcreek
Capnia umpqua
+ 2
Female (left) and male (right). 5.5 - 6 mm. Female. 6 mm. Female. 6 mm. Male. 6 mm. Male. 6 mm.
In the Photography Board by Millcreek
0
May 21, 2015
by Millcreek
Re: Lepidostoma sp.
+ 5
Late instars of panel case type. 11 mm larvae, 13 mm case. Late instars of panel case type. 11 mm larvae, 13 mm case. Early instars, panel case, 4-6 mm larvae and cases. Panel case larvae. 11 mm Turret case 8 mm. Larva 7mm.
In the Identify This! Board by Millcreek
6
Apr 19, 2015
by Millcreek
Siphlonurus sp. Intermediate nymph. About 15 mm (excluding cerci). Intermediate nymph. About 15 mm (excluding cerci). Ventral view of nymph shown in photo above. Mature nymph. About 16 mm (excluding cerci). Mature nymph. About 16 mm (excluding cerci).
In the Identify This! Board by Millcreek
0
Apr 1, 2015
by Millcreek
Re: Amiocentrus aspilus
+ 1

In the Photography Board by Millcreek
5
Mar 7, 2015
by Millcreek
Re: Spinner from recent trip to Patagonia
In the Identify This! Board by Byhaugh
4
Feb 14, 2015
by Millcreek
Re: They're Back Acentrella insignificans Ameletus sp Capnia umpqua Taenionema pacificum
In the Photography Board by Millcreek
6
Feb 5, 2015
by Millcreek
Baetis alius Female. 7 mm. Female. 7mm. Male. 6.5 mm. Male. 6.5 mm.
In the Identify This! Board by Millcreek
0
Jan 24, 2015
by Millcreek
Re: Neophylax larvae and pupae
+ 9
Mid-instar larvae. Collected May 6, 2007. Larvae 6 mm. Cases 6 mm. Mature larvae. Collected June 13, 2007. Larvae 10 mm. Cases 12 mm. Mature larva. Collected June 13, 2007. Larva 10 mm. Case 12 mm. Mature larva. Collected June 13, 2007. Larva 10 mm. Case 12 mm. Prepupa. 9 mm. Collected September 14, 2007.
In the Photography Board by Millcreek
3
Nov 27, 2014
by Millcreek
Re: Hydropsyche larvae and pupae (californica?)
+ 9
Photo taken December 30, 2013. 15 mm. Photo taken December 30, 2013. 15 mm. Photo taken June 28, 2014. 18 mm. Photo taken June 28, 2014. 18 mm. Photo taken July 13, 2014. Case with prepupa. 11.5 mm. In alcohol.
In the Identify This! Board by Millcreek
17
Nov 22, 2014
by Millcreek
Re: Fallceon spp.
+ 15
Fallceon quilleri nymph. Mature female. 7 mm (excluding cerci). Collected March 28, 2014. Dark variant. Fallceon quilleri nymph. Immature male. 6 mm (excluding cerci). Collected October 29, 2014. Light variant. Fallceon quilleri nymph. Mature female. 7 mm (excluding cerci). Collected March 28, 2014. Light variant. Fallceon quilleri nymphs. Immature females. 6 mm (excluding cerci). Collected October 5, 2014. Fallceon quilleri nymph. Mature male. 5.5 mm (excluding cerci). Collected November 11, 2013. Dark variant.
In the Identify This! Board by Millcreek
4
Nov 21, 2014
by Millcreek
Re: Ironodes sp.
+ 1
Ironodes nymph. 11 mm (excluding cerci). Collected May 11, 2010. In alcohol. Ironodes nymph. 11 mm (excluding cerci). Collected May 11, 2010. In alcohol. Ironodes nymph. 11 mm (excluding cerci). Collected May 11, 2010. In alcohol. Ironodes nymph. 11 mm (excluding cerci). Collected May 11, 2010. In alcohol. Ironodes nymph. 11 mm (excluding cerci). Collected May 11, 2010. In alcohol.
In the Identify This! Board by Millcreek
2
Nov 21, 2014
by Millcreek
Re: Hetaerina americana naiad
+ 4
In alcohol. 30 mm. April 13, 2014. Photo taken same day as collected so color is pretty close to the live naiad. In alcohol. 30 mm. April 13, 2014. Head of specimen above. In alcohol. 30 mm. April 13, 2014. Mentum of H. americana. Live specimen. 32 mm. April 9, 2014. Live specimen. Gills. April 9, 2014.
In the Photography Board by Millcreek
2
Nov 17, 2014
by Millcreek
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