This is the hatch chart for theSan Juan river in central New Mexico.
| Common Name | Dates of Emergence |
| Little Blue-Winged Olive | Mar. 1 - Oct. 31 |
| Grey Caddis | May 1 - June 30 |
| Midges | Jan 1 - Dec. 31 |
| Pale Morning Dun | July 10 - Sep. 15 |
| Terrestrials | Aug. 1 - Aug. 30 |
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