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Mayfly Distribution - Benton Co. |
| Scientific Name | County | Location |
| Acentrella insignificans | Benton | Columbia R |
| Acentrella insignificans | Benton | Yakima R, |
| Acentrella turbida | Benton | Yakima R |
| Attenella margarita | Benton | Yakima R |
| Baetis bicaudatus | Benton | Bridge Cr |
| Baetis bicaudatus | Benton | Chelan Boulder Cr |
| Baetis bicaudatus | Benton | Chiwawa R |
| Baetis bicaudatus | Benton | Columbia R |
| Baetis bicaudatus | Benton | Eightmile Cr trib |
| Baetis bicaudatus | Benton | Foolhen Cr |
| Baetis bicaudatus | Benton | French Cr |
| Baetis bicaudatus | Benton | Icicle Cr trib |
| Baetis bicaudatus | Benton | Indian Cr trib |
| Baetis bicaudatus | Benton | Jack Cr |
| Baetis bicaudatus | Benton | Leland Cr |
| Baetis bicaudatus | Benton | Little Wenatchee R |
| Baetis bicaudatus | Benton | Nason Cr |
| Baetis bicaudatus | Benton | Negro Cr trib |
| Baetis bicaudatus | Benton | Panther Cr |
| Baetis bicaudatus | Benton | Park Cr |
| Baetis bicaudatus | Benton | Rainy Cr |
| Baetis bicaudatus | Benton | Stevens Cr |
| Baetis bicaudatus | Benton | White R |
| Baetis bicaudatus | Benton | Whitepine Cr |
| Baetis bicaudatus | Benton | Yakima |
| Baetis tricaudatus | Benton | Columbia R |
| Baetis tricaudatus | Benton | Snipes Cr |
| Baetis tricaudatus | Benton | Spring C |
| Baetis tricaudatus | Benton | Yakima R |
| Callibaetis fluctuans | Benton | Columbia R |
| Callibaetis pictus | Benton | Richland |
| Camelobaetidius warreni | Benton | Yakima R |
| Diphetor hageni | Benton | Snipes Cr |
| Diphetor hageni | Benton | Yakima R |
| Drunella spinifera | Benton | Yakima R |
| Ecdyonurus simplicioides | Benton | Columbia R |
| Ephemera simulans | Benton | Columbia R |
| Ephemerella excrucians | Benton | Columbia R |
| Ephemerella excrucians | Benton | Columbia R |
| Ephemerella tibialis | Benton | Yakima R |
| Ephoron album | Benton | Yakima R |
| Fallceon quilleri | Benton | Snipes Cr |
| Fallceon quilleri | Benton | Spring Cr |
| Heptagenia solitaria | Benton | Columbia R |
| Hexagenia limbata | Benton | Snake R |
| Iswaeon anoka | Benton | Amon Wasteway |
| Maccaffertium terminatum terminatum | Benton | Columbia R |
| Maccaffertium terminatum terminatum | Benton | Yakima R |
| Rhithrogena robusta | Benton | Yakima R |
| Traverella albertana | Benton | Columbia R |
| Tricorythodes explicatus | Benton | Columbia R |
| Tricorythodes explicatus | Benton | Yakima R |
Based on: Mayflies (Ephemeroptera) of the far western United States.
Part I: Washington
by M. D. Meyer and W. P. McCafferty.
Created: 10/17/2008 Last modified: 07/26/2021 www.FlyfishingEntomology.com