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.
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This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.
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Lyrae on May 13, 2007May 13th, 2007, 3:12 pm EDT
I saw this on my deck this evening. Anyone have any ideas? I only know enough to catch a few fish :)
Thanks.
Thanks.
GONZO on May 13, 2007May 13th, 2007, 3:48 pm EDT
Lyrae,
Cool mayfly! I can't make out some of the details, but from the overall appearance it looks like a female Siphlonurus spinner to me.
Cool mayfly! I can't make out some of the details, but from the overall appearance it looks like a female Siphlonurus spinner to me.
Taxon on May 13, 2007May 13th, 2007, 4:03 pm EDT
That was my impression as well, also a female spinner. I'm thinking Siphlonurus alternatus. Don't see any Siphlonurus species listed for PA in my most trusted (national) source. However it's most likely incomplete in that regard.
GONZO on May 13, 2007May 13th, 2007, 4:19 pm EDT
Roger,
I can confirm that we do have Siphlonurus in PA. I've seen and even fished them on a few streams. Greg Hoover's 2002 survey of PA mayflies lists barbaroides, mirus, quebecensis, rapidus, and typicus as PA species.
I can confirm that we do have Siphlonurus in PA. I've seen and even fished them on a few streams. Greg Hoover's 2002 survey of PA mayflies lists barbaroides, mirus, quebecensis, rapidus, and typicus as PA species.
Taxon on May 13, 2007May 13th, 2007, 4:35 pm EDT
Gonzo-
Well, we seem to be in violent agreement on genus. And after all, identification to species based on a photograph of a female imago is problematic, at best. However, as Konchu has observed, it is fun.
Well, we seem to be in violent agreement on genus. And after all, identification to species based on a photograph of a female imago is problematic, at best. However, as Konchu has observed, it is fun.
GONZO on May 13, 2007May 13th, 2007, 4:54 pm EDT
Agreed, Roger, it is fun to guess. I was tempted to guess quebecensis, but the only species I can reasonably rule out is mirus.
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