| | Acc. No. | Year | Location | County | Observers |
| 17-74-24 | 1965 |
Muir Springs Park
| Morgan | Allegra Collister, Sylvia Brockner |
| 17-81-9 | 1981 |
Ryan Gulch Lake, Loveland
| Larimer | Dave Leatherman |
| 17-83-26 | 1983 |
Sawhill Ponds
| Boulder | Peter Gent, Laurens Halsey, Doug Ward |
| 17-84-42 | 1984 |
SE of 32 1/2 & D Rds.
| Mesa | Rich Levad |
| 17-87-17 | 1987 |
Craig
| Moffat | Judy Ward |
| 17-92-58 | 1992 |
Totten Res.
| Montezuma | Alan Versaw |
| 17-93-26 | 1993 |
Huerfano Lake
| Pueblo | David Silverman, Robert Dickson |
| 2002-50 | 2002 |
near Barbour Ponds SWA
| Weld | Andrew Spencer, Rachel Hopper, Richard Mendez |
| 2014-079 | 2014 |
Not Specified
| Otero | Bill Maynard |
| 2017-073 | 2017 |
Pond near Standley Lake, Westminster
| Jefferson | Dina Baker |
| 2018-058 | 2018 |
Cottonwood Hollow Natural Area
| Larimer | Robert Beauchamp, Joe Mammoser, Kevin Keirn, Sue Riffe |
| 2018-085 | 2018 |
CSU Environmental Learning Center
| Larimer | Andrew Bankert |