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.

Waterfalls over smooth bedrock above Titcomb Lakes

From Titcomb Basin in Wyoming

Stream photos

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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington

This seems to be a young larva of Limnephilus. Although not clear in the picture, several ventral abdominal segments have chloride epithelia.

7 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.

I am student of entomology plz,help me

This topic is about the Insect Order Diptera

This incredibly diverse order holds tens of thousands of species. They are the "true flies" with two wings, and they have complete life cycles (larva to pupa to adult). Beyond that they have little in common.

The most important family is Chironomidae, the midges. The craneflies of Tipulidae and the related families may also be important, as may be several of the others in the right place and time.

Example specimens

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Chironomidae (Midge) True Fly Larva

Dorsal view of a Chironomidae (Midge) True Fly Larva from the South Fork Snoqualmie River in Washington

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Chironomidae (Midge) True Fly Larva

Lateral view of a Chironomidae (Midge) True Fly Larva from the South Fork Snoqualmie River in Washington

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Empididae True Fly Adult

Lateral view of a Empididae True Fly Adult from the South Fork Snoqualmie River in Washington

I'm not fully confident in the ID on this one. I couldn't see for sure that there are two equal pads under the tarsal claws instead of three, but it seems that way. The antennae are 4-segmented, although I'm not sure if the last segment counts as a "segment" rather than a style@ or arista sticking off the third segment. It has three ocelli. The key characteristics generally point to Empididae except "Vein R4+5 usually branched." That vein certainly isn't branched in this specimen, but the key does say "usually."

SOHAIL
Posts: 1

SOHAIL on Jun 18, 2008June 18th, 2008, 6:10 pm EDT

plz help me i intrested in my subject so i request u all the order of physiology charector so plz guide line and i resarch in my entomological subject so i requested sir plz help me.

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Jun 18, 2008June 18th, 2008, 6:29 pm EDT

Sohail-

You ask for help, and say you are a student of entomology. However, the rest of your post doesn't make much sense to me. It is not at all clear what help you seek. If yours is a serious post, which I am somehow inclined to doubt, then you need to state your needs more clearly, and you will likely receive a useful answer.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com