Ants are a common meal for trout during the late summertime and early fall when hatching aquatic insects are less active. They end up in the water by unlucky chance following heavy rains, small landslides, and by their sometimes-clumsy movements. Flying ants fall into the water from overhanging vegetation or heavy winds.
Anglers fishing during the last summer in should always have a basic fly box selection of ant fly patterns on hand when flyfishing in Montana.
Wary, feeding trout will often readily rise to a well presented ant pattern after rejecting other fly imitations on Depuy's spring creek and Montana rivers.
Swarms of flying ants in between Varney Bridge and Ennis, Montana drive opportunistic feeding trout to the surface when little else will in late summer on the upper Madison River.
Our Bozeman fly fishing guides will often have clients use a small ant imitation behind a slightly larger, highly visible attractor dry fly on upper Yellowstone River guide trips in August and September.