Hellgramite expressed a fairly common complaint
in another topic:
I gotta tell ya you guys up in the North East must have some vary long winters.Maybe its just me but my brain is smoking just reading these posts.My head is spinning over how deep some of you guys get with this stuff.What ever happened to just fly fishing for Trout.I never thought I would need a PHD just to talk about fly fishing.
This has been addressed
in an entertaining way already, but there's a serious and worthwhile question behind it. This post is my (appropriately) complicated answer.
Fly fishing doesn't
need to be any more complex than you want to make it for yourself, but there are many worthwhile reasons to
want to complicate things. Sometimes it helps catch more fish, or bigger fish, or even one particularly difficult little fish that means more than the others because it required some clever trick. Most of the time, though, it just helps us understand more of what's going on around us on the stream.
Every fish and insect is the lead character in its own story, a story we glimpse only briefly as we cross paths on the river. Scientific details help us see the rest of the story, making our piece of it more meaningful. Think about watching two 30-second clips of television, one from your favorite show and one from a show you've never seen. The unfamiliar clip my be enjoyable, but you don't get much out of it beyond what happens in those 30 seconds. You probably can't guess the plot or tell very much about the characters. But if the clip comes from your favorite show, you can figure out exactly what's going on. You recognize the setting. You know the personality and background of each character, so you can guess what happened earlier to cause the current situation, and how they're likely to react. The clip reminds you of their past adventures and makes you anxious to see what happens next. Everything that happens in those 30 seconds is more meaningful because you can put it in the context of the whole show.
Fly fishing is just like that. The science behind it is the greater story that ties everything together, and the entomology helps us
keep the characters straight and deepens their stories.
For example, look at
Konchu's recent topic about parthenogenesis in Brown Duns,
Ameletus ludens. Parthenogenesis is reproduction by females without fertilization by a male, and
A. ludens is one of only a few mayflies that can do it. It's pretty hard to imagine this knowledge ever helping someone catch an extra trout. But it does a lot for the story when you're out on the river and see
A. ludens flying around. You'll know that that mayfly is very different from most of the others. It's not seeking a mate. It doesn't have two parents. Instead, it could be one of a long line of nearly identical clones, its DNA relatively unchanged from that of its great-great-(great x 150)-great grandmother that might have flown across a civil war battlefield on its own brief journey. Essentially the same bug existed as a genetic carbon copy year after year after year since before your grandparents were born. Each link in that chain survived countless close calls with everything from drought to predatory stoneflies to deer hooves, and--GULP--you just watched the grand finale, an ancient lineage ended in one slurp by a 7-inch brook trout. Now
that's a story. It's far more interesting than, "A brown bug just flew by."
Fly fishing can be about even more than these good stories, though (or about catching fish, or just enjoying how pretty it all is).
It appeals to puzzle-solvers. Some enjoy crosswords or Sudoku, or even mathematical proofs. I like watching a trout's every move and trying to figure each one out. It just went over and nipped at that other trout -- what did the other one do to provoke it? It just came up to the surface and hovered for a few seconds without seeming to grab anything -- why? The puzzles go on and on, and many get very deep. My favorite is the question of why trout sometimes key in on a hatch of tiny mayflies like Tricos and ignore bigger, meatier morsels during that time. You don't need to think about these questions to improve your fishing (although, of all these obsessions, this one is the most applicable), but it does make every fishing trip more interesting.
Aquatic entomology appeals to collectors. Some like coins or baseball cards. I collect trout stream insects and pictures of them. For me and many others, finding a good specimen of an uncommon species is exciting like finding a Mickey Mantle rookie card in the closet... if not quite as lucrative.
Realistic tying, fine rod-building, and photography appeal to artists. I don't think this needs to be explained; a realistic fly tier's attention to detail is as easy to understand as that of any painter, sculptor, or filmmaker.
We don't jump into these complex things because we think we
need them to catch fish. We do it because they're fulfilling in their own right, whether we're story-lovers, puzzle-solvers, collectors, artists, or all of the above. This site welcomes anglers with all motivations, but my vision for it is to be a special haven for those who indulge in the sport's complexity. We will continue to proudly discuss Latin names, the proper thickness of realistic thread legs, and the obscure behavior and anatomy of insects. If one of those topics isn't your cup of tea, just skip it and move on to the next one.