| | Acc. No. | Year | Location | County | Observers |
| 2001-46 | 2001 |
Crow Valley Campground
| Weld | Ruth Dick, Steve Dinsmore, Rachel Hopper, Steve Messick |
| 2003-123 | 2003 |
MT Evans Pay Station
| Clear Creek | Bill Schmoker |
| 2003-64 | 2003 |
CSU field campus, Pingree Park
| Larimer | Brenda Wiard |
| 2004-136 | 2004 |
Clifton
| Mesa | Rachel Hopper, Peter Gent, Roger Linfield |
| 2006-133 | 2006 |
5 miles south of Lamar
| Prowers | Jane Stulp |
| 2011-112 | 2011 |
Rye
| Pueblo | David Silverman |
| 2013-39 | 2011 |
1650 Ridge Drive, Grand Junction, Colorado, 81506.
| Mesa | Jackson Trappett, Todd Deininger |
| 2013-273 | 2013 |
Colorado Springs
| El Paso | Bill Maynard, Brandon Percival |
| 2014-183 | 2014 |
Grand Junction
| Mesa | Kathy Mihm Dunning |