cicadas

http://www.flytyingforum.com/pattern472.html http://www.flytyingforum.com/pattern263.html http://www.fishing.net.nz.._forums/topic15286.html here's a few I found. None are my patterns, or ones I have tied or fished.

I printed that particular pattern today. Thanks!

I have no idea. Seems every year someone tells me its the year for the 17 year cicada.

When you find out, please let me know. I thought they wouldn't be back for 17 yrs!! I will be 86 next time they return to central Pa...You guys will have to wheel me down to the stream bank and wrap a shawl round me....

As I understand it, it's a "class year" type of system, where there are cicadas that emerge every summer, but certain "Broods" are more populous in certain areas than others.
 
What has me a little stymied in the line though, are two things:
 
1) Cicada enthusiasts?!  Really?!
 
and 
 
2) It refers to "Brood XIX", 19.  If they're 17 year cycles, how do you have 19 broods?  I'm not saying they're wrong, I just don't know how that works.  (Maybe if I were a cicada enthusiast, I'd know this.)

There are annual cicadas and periodic cicadas.They are different species. Each summer the annual cicadas appear in July and be heard and seen through Labor Day, These cicadas are not nearly as numerous as the periodic cicadas. Generically speaking, the bodies of the Annual Cicadas are green, black and white. Some refer the Annual Cicada as the Dog Day Cicada. The Periodic Cicadas emerge typically in May and conclude their breeding cycle around July 4th. Most emerge every seventeen years although some broods occur every thirteen years. Periodic Cicadas appear smaller in size than the annuals and are black with red eyes and creamy yellow wing struts. If you closely at the venation of the periodic cicada's wing there will be a telltale W toward the upper part of the wing. In my area the periodics will make their next emergece in 2016. Interestly enough there was a small emergence of periodic cicadas last spring which was quite odd.