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Hatch Chart for Bighorn River, MT

Insect Size Body/Wing Color Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Midge 18-20 Black, olive and cream bodied
Pale Morning Dun 16-18 Yellow/tan body, smoky gray wing
Little Yellow Stonefly 16-18 Yellow/tan body, light tan to yellow wing
Caddis 16-18 Olive, brown, yellow, black
Baetis 16-20 Blue winged olive
Trico 18-22 Dark brown with white wing