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Closeup insects from the West Branch of the Delaware River

Female Maccaffertium terminatum Mayfly SpinnerFemale Maccaffertium terminatum  Mayfly Spinner View 5 PicturesI was able to identify this female because I captured her while she was mating with an identifiable male.
Collected June 7, 2007 from the West Branch of the Delaware River in New York
Added to by Troutnut on June 8, 2007
Male Maccaffertium terminatum Mayfly SpinnerMale Maccaffertium terminatum  Mayfly Spinner View 11 PicturesI positively identified this specimen under a microscope with a good key. It was one of the more common species in a generally light mixed bag of mayflies over a big Catskill tailwater last night.

I swooped this one out of the air while it was mating with a female, so I can be certain about her ID as well.
Collected June 7, 2007 from the West Branch of the Delaware River in New York
Added to by Troutnut on June 8, 2007
Male Maccaffertium ithaca (Light Cahill) Mayfly DunMale Maccaffertium ithaca (Light Cahill) Mayfly Dun View 6 PicturesBased on the identical size, shape, and relative proportions of different body parts, I'm pretty sure this dun is of the same species as two spinners I collected at about the same time. The color is dramatically different, but that's to be expected with many of these species in the transition from dun to spinner.
Collected June 7, 2007 from the West Branch of the Delaware River in New York
Added to by Troutnut on June 8, 2007
Male Epeorus (Little Maryatts) Mayfly DunMale Epeorus (Little Maryatts) Mayfly Dun View 7 PicturesThis Epeorus dun managed to emerge successfully even though it had apparently long several legs at some point and only partially grown them back.
Collected May 15, 2007 from the West Branch of the Delaware River in New York
Added to by Troutnut on May 18, 2007

Recent Discussions of the West Branch of the Delaware River

Trico picture 1 Reply »
Posted by Wbranch on Jan 26, 2013
Last reply on Jul 15, 2015 by AFISHN
I have seen many instances on the middle West Branch (From Upper Game Lands to Hale Eddy Bridge) where there will be zillions of Trico spinner in the air, and later on the water, and not a single rising fish. Yet from Balls Eddy down to where West Branch enters the main stem you will often find fish rising steadily to the spinners in pods remeniscent of the Missouri river pods of the 1990's. I've never seen Tricos above the Hale eddy bridge.
ReplyUpper Delaware...... 6 Replies »
Posted by Al514 on Sep 10, 2008
Last reply on Sep 22, 2008 by Martinlf
Dear Sirs/Madams:

I am an avid user of the Upper Delaware River. I have walked its banks, waded its pools, canoed its riffles, watched eagles and ospreys fish along side me, talked to families and youth groups as they enjoyed the same precious ecosystem. I purchased one of the first New York State "lifetime super sportsman" licenses and can assure you that I have a sincere interest in all of the natural wonders that make upstate new York a fantastic place to live. As a father, I continue to hope that my two sons will be able to someday experience the beauty of the Upper Delaware River. As an educator, I take students to the river to learn about what a unique treasure it is. I know of no other watershed where striped bass, American shad and sea lampreys can be seen in abundance, having traveled over 200 miles from the ocean without encountering a dam or other major barrier.

I have been extremely concerned over the water resrictions imposed in the past two years that have routinely reduced West Branch flows to levels not before seen. However, the current FFMP cuts previous flows of 280 cfs - 340 cfs at the Hale Eddy monitoring station to flows of less than 150 cfs. The mighty Delaware looks like a very small creek at these flows. Wild trout are compressed into a very small thermal refuge where their survival is compromised, huge areas of river bed are dry and exposed, killing the aquatic organisms that form the base of the food web in the ecosystem. People cannot fish over much of the river's length, taking a boat "ride" or canoe "ride" means exiting the water craft and dragging it over extensive areas only a few inches deep.

I urge you to look at the Upper Delaware River at its current flows before the September 24 vote on FFMP. Please allow this unique and precious river gem to be spared. I am grateful for your time and consideration of my request.

This is an e-mail I recieved from someone who I, and other people I know, respect as a person and Fly Fisherman. It was sent to numerous people, so members of this forum might already have recieved it. Does anyone have any more information on what exactly is giong on? I checked the flows on the USGS Website, and they have been quite low the past few days. Does anyone have the address of where to send a vote, or a website address of where to vote? Thanks.

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