Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Stream photos

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Psychodidae True Fly Larva Psychodidae True Fly Larva

Lateral view of a Psychodidae True Fly Larva from Mystery Creek #308 in Washington

This wild-looking little thing completely puzzled me. At first I was thinking beetle or month larva, until I got a look at the pictures on the computer screen. I made a couple of incorrect guesses before entomologist Greg Courtney pointed me in the right direction with Psychodidae. He suggested a possible genus of Thornburghiella, but could not rule out some other members of the tribe Pericomini.

8 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.

Arthropod Class Arachnida (Mites and Spiders)

These occasionally aquatic creatures are not known to be particularly important to trout, but I have a few neat pictures.

Specimens of the Arthropod Class Arachnida

4 Adults

Acari (Mite) Arthropod Adult

4 Pictures

This is the only picture in the set in which the mite was alive. I had to kill it in alcohol for the others, because it was scurrying around too much to stay in focus at the high zoom level needed to show some detail on such a tiny critter.

Dorsal view of a Acari (Mite) Arthropod Adult from Mystery Creek #62 in New York

These tiny little aquatic mites show up in my samples from time to time. This fairly large one is only about 1mm long, so these aren't relevant to trout, but it's interesting to know that they're down there, anyway.

Collected March 31, 2007 from Mystery Creek #62 in New York

Added by Troutnut on April 2, 2007

Collected March 31, 2007 from Mystery Creek #62 in New York and added by Troutnut on April 2, 2007

Acari (Mite) Arthropod Adult

3 Pictures

Collected June 15, 2018 from the South Fork Snoqualmie River in Washington

Added by Troutnut on June 18, 2018

Collected June 15, 2018 from the South Fork Snoqualmie River in Washington and added by Troutnut on June 18, 2018

Acari (Mite) Arthropod Adult

2 Pictures

Collected February 6, 2004 from unknown in Wisconsin

Added by Troutnut on January 25, 2006

Collected February 6, 2004 from unknown in Wisconsin and added by Troutnut on January 25, 2006

Arachnida (Mites and Spiders) Arthropod Adult

2 Pictures

Water mites are common in lakes and ponds but because they are so small they do not get noticed.These specimens are from temporary wetlands in Glacier National Park.

Collected July 19, 2010 from Various wetlands in Montana

Added by Bnewell on June 26, 2011

Collected July 19, 2010 from Various wetlands in Montana and added by Bnewell on June 26, 2011

1 Nymph

Arachnida (Mites and Spiders) Arthropod Nymph

3 Pictures

Mites are quite beautiful when viewed with magnification. Some get large like the middle photo which is of a red mite about the size of a pea.

Collected July 3, 2009 from Wetlands in Glacier National Park in Montana

Added by Bnewell on June 26, 2011

Collected July 3, 2009 from Wetlands in Glacier National Park in Montana and added by Bnewell on June 26, 2011

2 Streamside Pictures of Arachnida Arthropods:

View Fullsize

This spider lives in the rocks streambed of a Catskill trout stream.

In this picture: Arthropod Order Araneae (Spider).

Taken April 15, 2005 from unknown in Wisconsin

Added by Troutnut on February 1, 2006

Taken April 15, 2005 from unknown in Wisconsin and added by Troutnut on February 1, 2006

View Fullsize

In this picture: Arthropod Order Araneae (Spider).

Taken July 25, 2005 from the West Fork of the Chippewa River in Wisconsin

Added by Troutnut on February 8, 2006

Taken July 25, 2005 from the West Fork of the Chippewa River in Wisconsin and added by Troutnut on February 8, 2006

1 Underwater Picture of Arachnida Arthropods:

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A couple tiny aquatic mites are clinging to this rock.

In this picture: Arthropod Order Acari (Mite).

Taken March 31, 2004 from Mystery Creek #90 in Wisconsin

Added by Troutnut on January 25, 2006

Taken March 31, 2004 from Mystery Creek #90 in Wisconsin and added by Troutnut on January 25, 2006

Discussions of Arachnida

chuck

1 replies

Posted by Cspear on Aug 20, 2008 in the order Araneae

Last reply on Aug 20, 2008 by GONZO

I have these Arthropod Order Araneae (Spiders) all over my property last weekend in West Kill NY. Are they poisonous? Do they live in the creek? Are they coming out of the creek to hatch because each one had a wed and egg sacks inside. They are big! Any thing interesting or warnings about these, I'd like to know.

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