| Insect | Size | Begin | End | |
 |
Midges | 20-24 | January 1 | December 31 |
 |
Scuds | 12-14 | January 1 | December 31 |
 |
Ants | 12-16 | March 1 | September 30 |
 |
Beetles | 10-16 | March 1 | September 30 |
 |
Black Caddis | 16-18 | March 15 | April 15 |
 |
BWO | 16-20 | March 15 | October 15 |
 |
Caddis | 12-18 | May 1 | September 30 |
 |
Sulphur | 14-18 | March 15 | July 15 |
 |
Hendrickson | 12-14 | April 15 | May 15 |
 |
Light Cahill | 14-18 | June 5 | August 15 |
 |
Trico | 22 | July 15 | October 31 |
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