The Devil Bug, also know as the Doodle Bug, is one of those classic trout flies that your grandpa probably used to catch fish. This pattern is tied with some elk hair appears to be very simple. Don’t doubt the simplicity, this fly catches fish plain and simple. Anglers have success fishing the Devil Bug on top of the water, in the water column, or swung across riffles and runs. A classic fly that can produce trout in the net all year long.