Trude-style flies are attractor patterns that imitate nothing in particular. They float well in rough water and are visible. If there is no hatch on, and you feel compelled to fish a dry fly nonetheless, a Trude can be a good choice.
This dressing is for the Royal Trude. Variations include the Lime Trude (peacock-green-peacock body), Peacock (peacock herl body), and other body colors. A tail of moose mane hairs can be used.
How to Fish
Dress the fly with floatant and use standard dry fly presentations. Although Trudes are used (or should be used) when there is no hatch, it is a good idea to use a fly that is the same size as whatever has been hatching for the last couple of weeks.