Lower Owens River Stomach Pump Sample on Tuesday September 5, 2023

Today’s fish stomach sample is brought to you by a 9-inch wild brown trout caught in the lower Owens River at gate 8 on Tuesday September 5th, 2023. It was caught at 3:30 P.M. on a size 14 burlap caddis fished on a Euro Rig.

A nine inch brown trout caught at 4:30 P.M. on the lower Owens River at gate 8 on a Euro rig.

Inch worms, stick caddis, black fly larvae, a black fly, New Zealand mud snails and mayfly nymphs were found in this stomach sample. Can you identify these aquatic insects? Check out photo below for insect names.

Inch worms, stick caddis, black fly larvae, a black fly, New Zealand mud snails and mayfly nymphs was on the menu for this nine inch wild brown trout caught in the lower Owens River. Black fly larvae have an enlarged rear abdomen which is how you discern them from midge larvae. What fly pattern would you use? Did you know the insects? How many different species did you identify?

Upper Owens River Stomach Pump Sample Monday August 28, 2023

08-28-2023

Today’s fish stomach sample is brought to you by a 6-inch wild brown trout caught in the upper Owens River at the confluence of Hot Creek on Monday August 28th, 2023. It was caught at 4:00 P.M. on a size 16 brown elk hair caddis dry fly.

A six inch brown trout caught at 4:00 P.M. on the upper Owens River at the confluence of Hot Creek.

Midge nymphs, midge pupae and mayfly nymphs were found in this stomach sample. Can you identify these aquatic insects? Check out photo below for insect names.

 Midge nymphs, midge pupae and mayfly nymphs were found in this stomach sample. Can you identify these aquatic insects? Check out photo below for insect names.

Upper Owens River Stomach Pump Sample Thursday August 17, 2023

Today’s fish stomach sample is brought to you by a 5-inch brown trout caught in the upper Owens River at Longyears on Thursday  July 17th, 2023. It was caught at 4:00 P.M. on a size 12 green/gold wire Prince nymph fished on a three fly Euro rig.

A 5 inch brown trout caught on the upper Owens River at 4:00 P.M. at Longyears on the upper Owens River.

Mayfly nymphs, a wasp, a ladybug, caddis adults, caddis pupae and a midge nymph is in this brown trout’s stomach sample. Can you identify the insects? Check out photo below for insect names.

Mayfly nymphs, a wasp, a ladybug - beetle, a black ant, caddis adults, caddis pupae and a midge nymph pupae was on the menu for this 5-inch brown trout. Did you know the insects? How many different species did you identify?

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Lower Owens River Stomach Pump Sample on Wednesday August 9, 2023

Today’s fish stomach sample is brought to you by an 8-inch wild brown trout caught in the lower Owens River at Five Bridges on Wednesday August 9th, 2023. It was caught at 11:00 A.M. on a size 12 stoner nymph on a three fly Euro rig.

An 8-inch brown trout caught at 11:00 A.M. on the lower Owens River at Five Bridges with flows of 290 CFS.

Hydropsyche caddis nymphs, mayfly nymphs, a mayfly adult, scuds and a stonefly nymph were found in this stomach sample. Hydropsyche caddis nymphs have anal hooks to keep them attached to the rocks in the substrate. Can you find the anal hooks on the hydropsyche caddis nymphs? Can you identify these aquatic insects? Check out photo below for insect names.

Under high flows hydropsyche caddis flourish. When flows drop the caddis migrate with the dropping water concentrating their population and making them available to predations by trout. Did you know the insects? How many different species did you identify?

Upper Owens River Stomach Pump Sample on Friday August 4, 2023

Today’s fish stomach sample is brought to you by an 8-inch wild brown trout caught in the upper Owens River at the Hot Creek confluence on Friday August 4th, 2023. It was caught at 4:30 P.M. on a size 16 hot spot pheasant tail nymph on a three fly Euro rig.

An 8-inch brown trout caught at 4:30 P.M. in the Hot Creek confluence area of the upper Owens River.

Slightly digested bait fish, a small grasshopper and a mayfly exoskeleton is what this brown trout was munching on. Can you identify these aquatic insects and the baitfish? Check out photo below for insect names.

This 8-inch brown trout was eating the calories to put on some weight. Did you know the insects or the baitfish? How many different species did you identify?

Big Springs Stomach Pump Sample on Saturday July 29, 2023

Today’s fish stomach sample is brought to you by a 10-inch brown trout caught in the Big Springs area of the  upper Owens River on Saturday July 29th, 2023. It was caught at 1:30 P.M. on a size 16 elk hair caddis dry fly.

A 10-inch brown trout caught at 1:30 P.M. in the Big Sprigs area of the upper Owens River.

Wasp, little yellow stone flies, midge nymphs, mayfly exoskeleton and mayfly adults is what this opportunistically feeding brown trout was eating. Can you identify these aquatic insects? Check out photo below for insect names.

This 10-inch brown trout was feeding opportunistically on nymphs and adults. Did you know the insects? How many different species did you identify?

Upper Owens River Stomach Pump Sample Wednesday July 26, 2023

Today’s fish stomach sample is brought to you by a 7-inch brown trout caught in the upper Owens River at the confluence of the north fork of Hot Creek area on Wednesday July 26th, 2023. It was caught at 12:00 P.M. on a size 16 hot spot pheasant tail nymph fished on a three fly Euro rig.

A 7-inch brown trout caught on the upper Owens River at 12:00 P.M. in the area of the north fork of Hot Creek confluence.

Caddis and mayflies is what this brown trout was feeding on. Can you identify these aquatic insects? Check out photo below for insect names.

Caddis adults, one caddis pupae and several mayfly nymphs was on the menu for this 7-inch brown trout. Did you know the insects? How many different species did you identify?

Upper Owens River Stomach Pump Sample from Sunday July 23, 2023

Today’s fish stomach sample is brought to you by a 5-inch juvenile brown trout caught in the upper Owens River at the confluence of the north fork of Hot Creek area on Sunday July 23th, 2023. It was caught at 11:30 A.M. on a size 16 hot spot pheasant tail nymph fished on a three fly Euro rig.

A 5-inch brown trout caught on the upper Owens River at 11:30 A.M. in the area of the north fork of Hot Creek confluence.

Mayflies and midges is what this juvenile brown trout was feeding on. Can you identify these aquatic insects? Check out photo below for insect names.

Mayfly nymphs and midge nymphs was on the menu for this 5-inch juvnile brown trout. Did you know the insects? How many different species did you identify?

Bishop Creek Canal Stomach Pump Sample from Thursday July 13, 2023

Today’s fish stomach sample is brought to you by an 8-inch brown trout caught in Bishop Creek Canal in front of the Caltrans building on Thursday July 13th, 2023. Outside temperatures reached 100 degree in the afternoon. It was caught at 4:00 P.M. on a size 16 hot spot pheasant tail nymph fished on a three fly Euro rig.

An 8-inch brown trout caught on Bishop Creek Canal at 4:00 P.M. on a 100 degree day in the Owens Valley.

This fish was feeding on a number of different aquatic insects. Can you identify the aquatic insects in this sample? Check out photo below for insect identification.

Mayfly nymphs and scuds have been the dominate insects the trout are feeding on in Bishop Creek Canal. Did you know the insects? How many different species did you identify?

Upper Owens River Stomach Pump Sample from Friday July 07, 2023

07-07-2023

Today’s fish stomach sample is brought to you by a 7-inch brown trout caught in the upper Owens River near the confluence of the north fork of Hot Creek on Friday July 7th, 2023. It was caught at 12:40 P.M. on a size 16 hot spot pheasant tail nymph fished on a three fly Euro rig.

A 7 inch brown trout caught on the upper Owens River at 12:40 P.M. in the area of the north fork of Hot Creek confluence.

Mayflies were on the diet in this brown trout’s stomach sample. Can you identify the species of mayflies? Check out photo below for insect names.

Mayfly nymphs and midge pupae were on the menu for this 7-inch brown trout. Did you know the insects? How many different species did you identify?

Bishop Creek Canal Stomach Pump Sample Thursday June 15,2023

Today’s fish stomach sample is brought to you by a 6-inch brown trout caught in Bishop Creek Canal on Thursday June 15, 2023. It was caught at 12:30 P.M. on a size 18 bead head flash back pheasant tail nymph fished under an indicator.

A 6 inch brown trout caught on Bishop Creek Canal behind the old Ford Dealer at 12:30 P.M. on June 15, 2023.

Scuds were the prominent species in this trout’s stomach sample. These scuds had a tan body with a dark dorsal. Can you identify them. Check out photo below for insect names.

This trout found a variety of aquatic insects to feed on. Did you know the insects? How many different species did you identify?

Bishop Creek Canal Stomach Pump Sample from Saturday April 15, 2023

Today’s fish stomach sample is brought to you by a 7-inch brown trout caught in Bishop Creek Canal on Saturday April 15, 2023. It was caught at 6:00 P.M. on a size 18 olive quilldigon fished on a Euro rig.

A 7 inch brown trout caught on Bishop Creek Canal behind the old Ford Dealer at 6:00 P.M.

Midges, scuds, New Zealand mud snails and probably a few mayflies. There might be an aquatic sow bug in the sample. Can you identify them? Check out photo below for insect names.

This trout found a variety of aquatic insects to feed on. Did you know the insects?

Hot Creek Stomach Sample from Sunday December 5, 2021

Today’s fish stomach sample is brought to you by an 8-inch brown trout caught in the upper section of Hot Creek Canyon on Sunday December 05, 2021. It was caught at 2:00 P.M. on a size 18 bead head flash back pheasant tail nymph fished on 5X tippet fished below a size 16 Adams parachute.

An 8 inch brown trout caught in the upper section of Hot Creek Canyon that took a size 18 bead head flash back pheasant tail nymph under an Adams parachute at 2:00 P.M.

Hydropsyche caddis nymphs in a dark olive color make up the bulk of the sample.

Hydropsyche caddis nymphs was the most prevalent insect in the sample and the one I would imitate with a fly.

Lower Owens River Stomach Sample From Friday November 11, 2021

Today’s fish stomach sample is brought to you by an 11-inch brown trout caught at gate 11 in the catch and release section of the lower Owens River on Friday November 19, 2021. It was caught at the tell end of the blue wing olive hatch at 1:50 P.M. on a size 20 bead head flash back pheasant tail nymph fished on 5X tippet five feet below an indicator with a size 1 split shot a foot above the nymph,

An 11 inch brown trout from the lower Owens River at gate 8 that took a size 20 bead head flash back pheasant tail nymph under and indicator at 1:50 P.M.

Caddis and mayfly nymphs make up the sample from the brown trout.

Stick caddis, blue wing olive mayfly nymphs, midge pupae and a size 20 bead head flash back pheasant tail nymph are in this photo.

Lower Owens River Stomach Sample from Sunday October 24, 2021

Today’s fish stomach sample is brought to you by a 10-inch brown trout caught at gate 11 on the lower Owens River at 11:00 A.M. This brown trout took a size 16 olive quilldigon. This trout was keyed in on baetis nymphs, but was feeding opportunistically on an ant and on baetis duns.

A ten inch wild brown trout from gate 11 on the catch and release section of the lower Owens River caught at 11:00 A.M.

This stomach sample has baetis nymphs and duns, an ant and a size 18 olive quildigon for size comparison.

Baetis nymphs was the prominent insect found in this stomach sample.

Lower Owens River Stomach Sample from Sunday October 31, 2021

Today’s fish stomach sample is brought to you by a 10-inch brown trout caught at gate 8 on the lower Owens River at 1:00 P.M. This brown trout took a size 16 Butano nymph. This trout was keyed in on baetis nymphs, but was feeding opportunistically on hydropsyche caddis and stick caddis.

A ten inch wild brown trout taken on a Butano nymph from gate 8 on the catch and release section of the lower Owens River.

This trout was feeding on beats nymphs, hydropsyche caddis and stick caddis.

The beats nymphs were a size 20 pheasant tail nymph for comparison.

Upper Owens River Stomach Sample from Saturday July 10, 2021

Today’s fish stomach sample is brought to you by a 11-inch rainbow trout caught at the confluence of the upper Owens River and Hot Creek in the early afternoon. This rainbow trout took a size 12 Morrish Hopper. This trout fed opportunistically on insects that floated in front of this trout.

An 11-inch rainbow that took a size 12 Moorish Hooper.

This trout was feeding opportunistically on mayfly duns, mayfly nymphs, and a beetle.

This fish was feeding opportunistically on what ever floated down the river.

Hot Creek Interpretive Site Stomach Sample from Thursday July 1, 2021

07-01-2021

Today’s fish stomach sample is brought to you by a 10-inch rainbow trout caught at Hot Creek interpretive site at 10:00 A.M. This rainbow trout took a size 24 trico spinner. The sample has a few olive mayfly nymphs, and mostly trico spinners. 

A 10 inch rainbow trout from Hot Creek that took a size 24 trico spinner. Notice the trico spinner in front of the trout’s nose.

Trico spinner mayflies make up the bulk of this sample taken at 10:00 A.M.

This 10 inch rainbow trout was gorging on trico spinners like the size 24 in the photo..

Lower Owens River Stomach Sample from Thursday June 24, 2021

Today’s fish stomach sample is brought to you by a 10-inch brown trout caught in the lower Owens River below Pleasant Valley Reservoir Dam. This brown took a size 16 Butano nymph. This fish was caught at about 4:00 p.m. The sample has mayfly nymphs, and black fly larvae. This is a partial sample of the insect quantity taken with the stomach pump. All insects from the sample are represented in the dish.

A 10 inch wild brown trout from the lower Owens River that took a size 16 Butano nymph.

Mayfly nymphs and black fly larvae from a stomach sample of a 10 inch brown trout caught on June 24 in the lower Owens River.

A partial sample from a stomach sample taken from a 10 inch brown trout showing the mayfly nymphs and black fly larvae.

Jun 11th Post

The Stomach Pump Samples go here