Blog & Latest Updates
Fly Fishing Articles
Insects by Common Name
|DayTripper||May 30th, 2013, 8:17 pm|
|Collected this guy on a northern Michigan trout pond last night. Found it struggling on the surface in the middle of the lake. Not sure if it just emerged or if it fell in while flying over. Anyone know how to tell what the sex is on these? I am also curious what genus/species it might be. Thanks!|
|Sayfu||May 30th, 2013, 8:37 pm|
I don't think they ever emerge out of the water. Don't all craneflies pupate, and emerge on land? Always scary to say "all".
|DayTripper||May 30th, 2013, 8:59 pm|
|According to the crane fly page here on troutnut, |
Craneflies pupate for one to three weeks. The species which do so in the water then swim to the surface to emerge in the style of caddisflies, and are presumably vulnerable to trout, though I have not read about good fishing during these events.
Swisher and Richards in Selective Trout say the larvae all crawl out of the water to pupate, conflicting with the above account. There are so many species that it seems likely both behaviors occur in some species."
I checked a half dozen other websites and all say that they crawl onto land. In Matching the Hatch, Schweibert references species that pupate and emerge in the water (late mornings). McCafferty also references that there are species that pupate in water, but doesn't go into much detail.
|Taxon||May 30th, 2013, 9:27 pm|
Site EditorRoyse City, TX
Anyone know how to tell what the sex is on these?
The terminal adominal segment of a male is expanded and rounded, whereas the female's tapers to a point. So, I believe your photos are of a female.
|Creno||May 30th, 2013, 9:38 pm|
|Grants Pass, OR|
|Definitely a female - males have much more complex parts. Is that a metric or english rule? I see the 10ths but I have an english rule in 10ths so thought I would check. If english it is likely one of the Tipula. If metric I suspect there are some other genera that large. Tipula are not typically pond forms, more likely the marshy areas surrounding the pond.|
|DayTripper||May 30th, 2013, 9:44 pm|
|Thanks, guys! |
Its a metric ruler, I measured this one at a smidge under 25mm.
|Crepuscular||June 1st, 2013, 9:31 am|
|Ok I'm definitely not an expert but the elongated abdomen of this female narrows it down somewhat and after running it through the key, I'm somewhat confident in my determination... Definitely Tipulidae, probably Tipula dorsimacula. Pretty common from what I read and very widespread distribution. One generation a year. If it is T. dorsimacula, it is a terrestrial species (the ovipositor is a clue to that) that probably just fell into the water.|
|Re: What might this be.|
In the Identify This! Board by Snowsquatch
|5||Sep 4, 2012|
|Re: Great Autumn Brown Sedges on Potomac River|
In the Caddisfly Genus Pycnopsyche by BrettB
|3||Oct 3, 2008|
In the Identify This! Board by Sayfu
|4||Aug 5, 2012|
|Re: My first midge sequence attempt|
In the Photography Board by Falsifly
|4||Apr 30, 2011|
|Re: Nymph size Question|
In General Discussion by DrLaser
|4||Jun 8, 2012|
|Re: changing water level|
In General Discussion by CaseyP
|9||Oct 2, 2008|
In the Identify This! Board by Sundula
|10||Apr 14, 2013|
|Re: Sialis sp.|
In the Identify This! Board by Millcreek
|5||Dec 5, 2016|
|Re: Escargo-eating trout and other mysteries of stillwater fishing|
In General Discussion by Jmd123
|1||Nov 4, 2015|
|Re: British stream etiquette|
In General Discussion by GoofusBug
|2||Mar 21, 2009|