Insects and other foods the trout should be eating:
1.    BWOs (Little)
2.    Cream Cahills
3.    Little Yellow Stoneflies (Little Summer Stones)
4.    Slate Drakes
5.    Little Green Stoneflies
6.    Mahogany Duns

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

Mahogany Duns
When it comes to the Blue Quill mayfly, you will find that most anglers that fish the streams of the Smokies
have heard the name although some may think it is the name of a fly pattern rather than an insect and it is
both. When it comes to the Mahogany Dun mayfly, you will find only a small percentage that have head of it.
Many of those that have heard the name think it is the same as a Slate Drake. I've even heard guides mix
the common names up. What is strange about this is there's probably a lot more Mahogany Duns in the late
Summer and early Fall seasons than Blue Quills in the Spring, yet most anglers haven't heard of them. The
reason for it is none of the books written about the Smokies list the insect and none of the fly shop
salesmen I'm familiar with anywhere near the Smokies known what they are.

The Discover Life Great Smoky Mountains National Park Taxa Biodiversity
list these species.
Paraleptophlebia assimilis  
Paraleptophlebia guttata  
Paraleptophlebia moerens
Paraleptophlebia mollis
Paraleptophlebia swannanoa  

Under the "species" category as listed above, the map where these exist includes about every watershed in
the park. I'm sure they are in the ones they haven't checked yet. That agrees with our findings when we
researched the aquatic insects in the park. We found many of the other species listed, such as the
mollis, in
most all the watersheds.

To make this plain and simple, there are a ton of these insects in the streams of the park and
they are an
important trout food that's available and rather plentiful during the times most other mayflies
aren't plentiful in fully grown sizes.

The mollis and guttata species are found on most all freestone streams in the east and midwest as well as
some other types of water in some cases. Just for information, the
bicornula species is found on a few
western streams in fair quantities at times.   There are also
gregalis, memorialis and temporalis species
found in the western states. The
heteronea species is found on several western streams on both fast flowing
freestone rivers and streams as well as those with slow to moderate current. They are all usually slightly
larger Mahogany Duns. On some western streams they are considered a major hatch.
Copyright 2012 James Marsh