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.
Oldredbarn on Mar 11, 2010March 11th, 2010, 5:24 am EST
If you haven't done so check out www.discoverlife.org...It's a general biology site but there are some interesting photos you can click on and enlarge of mayflies, stones, and caddis. There are other aquatic insects like damsels and dragonflies, and insects in general that may fall in to the stream from time to time. These phots found there like Jason's here are good models when you are working at the vise. If you are like me and like to mix up your own special dubbing colors these can be a great help.
"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively
"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
Wbranch on Jan 31, 2013January 31st, 2013, 11:07 am EST
Here is a bug site I found a couple of years ago that be of some interest. Once you open the web site you can click on any picture and it will enlarge. You can keep clicking it and the image gets bigger and bigger. Great detail with virtually no out of focus images.