The Delaware River

Mayflies

Caddisflies

Stoneflies

Closeup insects from the Delaware River

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Siphlonurus quebecensis (Gray Drake) Mayfly Nymph

View 5 PicturesI photographed this nymph in the middle of molting between one instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.) and the next (not hatching).

Collected May 13, 2007 from the Delaware River in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Polycentropus (Brown Checkered Summer Sedges) Caddisfly Larva

View 4 Pictures

Collected May 13, 2007 from the Delaware River in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Penelomax septentrionalis Mayfly Nymph

View 3 Pictures

Collected May 13, 2007 from the Delaware River in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Male Heptagenia culacantha Mayfly Dun

View 3 PicturesHyun Kounne generously provided photos of the striking, hard-to-find Heptagenia culacantha from the mainstem Delaware River. She mentioned it was one of maybe half a dozen she saw on the water that day.

Collected June 3, 2017 from the Delaware River in New York
Added to Troutnut.com by Troutnut on December 5, 2019

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Recent Discussions of the Delaware River

shad run/ Delaware and tribs 3 Replies »

Posted by Mcjames on Feb 8, 2010

Last reply on Jan 19, 2015 by Sandfly

at risk of offending the purists... can anybody help me with timing the shad run on Delaware and/or tribs? I will want to wade so has to be upper reaches I guess. I am told lower Neversink has a healthy shad run? and while I am asking, does the striper spawn more or less coincide? is there a time of year when one is likely to catch shad/stripers/trout all on a fly? I have caught smallmouth/juvenile stripers/trout in same stream/same day once before (Croton River); but I am told there is no longer a viable shad run there, as several years ago they cut off all flow from the dam upstream.

Reply Delaware 2 Replies »

Posted by Jesse on Jun 29, 2011

Last reply on Jun 30, 2011 by JOHNW

Any suggestions as to what might be effective on the Delaware right now?

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Jargon Defined:

Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.

Molting: When aquatic insects with hard exoskeletons (like mayfly and stonefly nymphs) grow bigger, their exoskeleton does not grow with them. Instead they grow a new, larger one underneath and shed the old one when it's too small. This process is called molting.

Nymph: The juvenile, underwater stages of mayflies, stoneflies, dragonflies, and damselflies and other aquatic insects whose juvenile stages are covered by hard exoskeletons. The word can also refer to the fishing flies which imitate these creatures, in which case it is used as a blanket term for flies imitating any underwater stage of an invertebrate (except for crayfish and leeches).

Trout Streams > New York > The Delaware River

Closeup insects from the Delaware River

Recent Discussions of the Delaware River

Start a Discussion of the Delaware River:

Jargon Defined:

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