Flying insects and emerging nymphs are common on most bodies of water, but hatches do not occur 24 hours a day. There are many periods during the day when no bugs are hatching. This is a great time to fish with an Attractor Dry Fly or Attractor Nymph. Attractors are not designed to imitate a specific insect, but rather, designed to look buggy or flashy or colorful, and can be very effective when fish are not keyed into a specific hatching bug.
Attractors are effective because of the flashy and/or bright colors used to tie these flies. After watching naturals that blend in with the surroundings all day, that flashy colored attractor is going to get their undivided attention!