From mid-July and
well into September, the Rocky Mountain Fly Angler - that's us, my friends -
should be carrying and fishing with terrestrial patterns. They work.
It’s the middle
of the summer and water levels are fabulous, trout are
hungry and bugs are active. This makes for a good time to be on the water,
fishing. There is a virtual cornucopia of insects and food available to
greedy trout. In addition to mayflies, caddis, stones and midges,
terrestrials are present and ready for duty, which is to be both server and
entrée to dining trout.
Terrestrials make up a significant portion
of the biomass of our planet. At least that’s what National Geographic says.
In Colorado and the Rocky Mountain West there are lots of insects that live
life on land and lose it in the water. They include grasshoppers, beetles
and ants as well as cicadas, bees and so on.
All terrestrial insects go through their
growth process on land, including
that
found along the banks of streams and lakes. Many are clumsy and fall off
limbs, rocks, grasses or leaves into the water, which is not their place of
choice. When they are in the water terrestrials make lots of racket,
thrashing about in their attempt to return to terra firma. Or, they drown.
Summer days are likely to be hot and bright.
Trout don’t like either and seek out shelter from both. Streams and lakes
have areas that are shady at different times of the day and many are found
along banks. Clumsy terrestrials on banks, falling into the water, plus
opportunistic trout lying
along shady banks equals angling opportunities for us!
During the middle of the day, when surface
and other apparent feeding activity of the morning subsides, look for the
shady side of a bank, rock, log or other cover; tie on a hopper, ant, beetle
or cicada imitation and fish the water. When I see terrestrials they seem to
vary in size. For example, hoppers along streamside growth may be anywhere
from a size #6 all the way to a #14 or even smaller. However, the shape of
hoppers, ants, beetles and so on is similar. Hoppers are long and boxy, ants
have three well-defined segments and beetles are chunky and somewhat round.
I tie and fish all of them in various sizes, depending on the depth of the
water and how I see fish reacting to my fly. I do think fish are greedy and
want to get fat, so I usually go with larger patterns first. This seem
somewhat odd after
fishing
the morning with small spinner or caddis patterns, but it feels great when a
big old brown takes a size #8 hopper drifting along a bank.
Adjust leaders according to the size of the
fly. Divide the size of the fly by 3 to determine tippet diameter. When I
fish a size #8 I use 4X at a minimum, but 3X works fine as well. Thinner
tippet will result in the fly twisting the tippet during the cast, and
fixing twists and tangles takes away from fishing time. This is bad. If you
like fishing two flies try a large parachute hopper and a smaller beetle or
ant below. The fish will usually eat one or the other.
Work slowly upstream or along the bank of a
lake, looking for shady spots that might hold a trout. Fish may be in very
shallow water as long as they feel safe and cool. At times I see a dorsal or
tailfin out of the water’s surface as I fish the edges of local streams. A
well-placed cast just above the fish’s position often results in a take, and
then the battle is on. I’m particularly careful when approaching branches
that hang over the stream as several trout may be holding in one area of
shade, and the chance to hook fish in these spots is both challenging and
fleeting.
When I approach an overhanging branch I like
to make a sidearm cast that allows the line, leader and fly to travel
parallel and close to the surface of the water. As the loop finishes and the
line straightens I want the fly to travel past straight so it moves under
the overhang while the tippet, leader and line is outside of both the
obstacle and the drift lane. This cast takes practice and is effective and
useful.
Be sure to include a few terrestrial
patterns in your arsenal of flies, and when the day is bright and hot and
the fishing slow, look to shade and bank side cover for always-hungry trout.
Feed them a hopper, ant or beetle and build good fly fishing memories.