Insects and other foods the trout should be eating:
1.    BWOs (Eastern)
2.    Green Sedges (Caddisflies)
3.    Cinnamon Caddis (Mostly Abrams Creek)
4.    Cream Cahills
5.    Little Yellow Stoneflies (Little Summer Stones)
6.    Sulphurs
7.    Slate Drakes
8.    Little Green Stoneflies

Most available/ Other types of food:
10.  Sculpin, Minnows (Streamers)
11.  Inch Worm (moth larva)
12.  Beetles
13.  Grasshoppers
14.  Ants

Eastern Blue-winged Olives - Emergers
Each of the species may emerge for a period of anywhere from a month to two months,
usually around the middle of the day, depending upon the species and the elevation. Again,
depending on the species, they may emerge anywhere from the first of May until the end of
July after most of the other Eastern mayfly species have hatched and then again, during the
later part of August and September. Like the other species of Blue-Winged Olives, this long
emergence period make them important. Most of the duns we have found were found in late
September. I'll list the species again in order to show that I'm really trying to put several
different species into one category called Eastern BWO's and that accounts for the wide
variation in the hatch times.
Drunella allegheniensis  
Drunella conestee  
Drunella cornuta  
Drunella cornutella  
Drunella lata  
Drunella longicornis  
Drunella tuberculata  
Drunella walkeri  
Drunella wayah  

Based on our experience, it seems the hatches are rather strung out through the summer
months with the largest concentrations appearing in September.

On the average Eastern Blue-winged Olives are larger than the other Blue-winged Olive
species. They will vary from a large hook size 14 to an 18. Most of them we have found in the
Smokies are a hook size 16.

You are not going to find any super hatches of these mayflies. The most we have seen is
five or six duns at any one location. That doesn't necessarily mean there could not be larger
hatches that occur. At the right place and time better hatches are possible. I base this on the
fact that we have found plenty of the nymphs in most all of the major streams in the Smokies.
Considering that they hatch over a long period of time and that there are more than one
species, it could be that they just don't hatch in large quantities at any one time.

The Discover life information provided by this website is incredible. Those responsible for
this have undertaken a huge task and you can take my word that lots of hard work has been
put forth to come up with the data they have. Although this wasn't done for the benefit of
anglers, it does provide a huge amount of information for us. Click on the
Drunella Lata link
under "where" on the above page link.
This shows exactly where in the park they acquired
samples of this one species.

The nymphs emerge anywhere from the bottom to just underneath the surface of the water.
This means there may be a dun accenting to the surface instead of a nymph. Wet imitations
of the newly emerged dun work great. The duns emerge in the slower moving water
immediately adjacent to the runs and riffles. Most of the duns we have seen on the water
were in pockets behind boulders. Sometimes you will spot the duns perched on the boulders
out in the stream. I suspect that the fact they emerge below the surface has something to
do with their being able to cope with the warmer times of the day and the times of the year
they hatch. This is strictly guessing. I do know that all of the duns we have found on the
streamside were clinging to the bottom of a leaf, upside down.

Fish the emerger imitations just beneath the surface of the water or in the surface skim in a
dead drift. Trailing shuck imitations fished in the skim work great for this mayfly. Every time
that we have found duns, we have been able to catch trout on our Perfect Fly Blue-winged
Olive trailing shuck emerger. That doesn't seem so unusual until you consider that was
usually in the middle of the day during the some of the hottest days of September.
Copyright 2012 James Marsh