.......................  ......Fly Fishing Yellowstone National Park

09/15/09

Choosing the Right Fly - Part 10

Where Trout Feed During Hatches:
Where do the trout feed during aquatic insect hatches? For example, where do
midges hatch and the trout feed on them?
Answer: In the slow moving water such as eddies, calm pockets and the slow
moving water of pools. Some hatch in the smooth sections of the meadows.

Where do most mayflies hatch?
Answer: Even the clingers that live in the fast water runs and riffles move to the
slow moving water of calmer pockets and shallow water that is near banks and
behind boulders to hatch. Just about all the crawlers and swimmers move to
slow to moderately moving water to hatch. Some hatch is the moderate smooth
water.

Where do mayfly spinners fall?
Answer: Usually in the riffles and runs where they hatched but they are eaten by
trout in eddies, calm pockets and the slow water at the heads of pools where
they collect.

Where do stoneflies hatch?
Answer: They move out of their fast water habitat into slower, shallower water to
hatch on the banks and rocks.

Where do the caddisflies hatch?
Answer: They just about always move to the slow to moderately flowing water for
their pupae to emerge.

In other words, about everything that hatches does so in moderate to calm
water. Often this slower moving water is very close to fast water. Often the
calmer water is in pockets distributed throughout the stream within the fast water
of the stream. Sometimes it is the ends of long runs where the water slows
down. If the newly hatched insect stays on the water and doesn’t fly away
quickly, it will most likely be caught up in the fast currents. It depends on the
particular species hatching.

Continued tomorrow

Copyright 2009 James Marsh