Madison River entomology is relatively straightforward and, much to the delight of anglers, quite predictable from year to year:
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Blue Winged Olive, size 20-26
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End of May to early July
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Sept through Oct
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Blue Winged Olive, size 16-20
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End of May to early July
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Sept through Oct
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Trico, size 20, 22
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August and September
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PMD, size 14-18
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End of May to End of June
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July through mid-Aug
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Caddis, size 12-18
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End of June through mid-Aug
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Golden Stonefly, size 6, 8
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End of June through mid-July
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Salmon Fly, size 4, 6
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End of June through early July
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Ants, size 14, 16
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Mid-July through mid-Sept
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Beetles, size 14
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Mid-July through mid-Sept
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Grasshoppers, size 8, 10, 2XL
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Mid-July through mid-Sept
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