| | Acc. No. | Year | Location | County | Observers |
| N-34-11 | 1972 |
Burnt Mill Road area
| Pueblo | Claire Griffiths, Donna Bregenzer, Michael Schultz |
| 34-73-102 | 1973 |
Burnt Mill Road area
| Pueblo | David Griffiths, Van Truan |
| 34-74-161 | 1974 |
Burnt Mill Road area
| Pueblo | David Griffiths, Van Truan |
| 34-75-43 | 1975 |
Pueblo
| Pueblo | Van Truan |
| 34-78-12 | 1977 |
Durango
| La Plata | Elva Fox |
| 34-85-25 | 1985 |
Ridgway
| Ouray | James Guadagno, Mark Janos |
| 34-87-51 | 1987 |
Pueblo Reservoir area
| Pueblo | Mark Yaeger, Peter Gent |
| 34-88-22 | 1988 |
Hale area
| Yuma | Peter Gent |
| 34-91-48 | 1991 |
Fountain Creek Regional Park
| El Paso | Toni Brevillier |
| 34-92-56 | 1992 |
St. Charles Canyon, 3 miles from Beulah
| Pueblo | Anne Whitfield, Brandon Percival |
| 34-94-45 | 1994 |
Rifle Falls State Park
| Garfield | Kim Potter |
| 34-94-46 | 1994 |
1 ml W of Uravan
| Montrose | Karleen Schofield |
| 34-95-62 | 1995 |
Canon City Riverwalk
| Fremont | SeEtta Moss, Mark Janos, David Pantle, Brandon Percival |
| 34-96-46 | 1996 |
Uravan
| Montrose | Tony Leukering |
| 34-96-47 | 1996 |
Antonito area
| Conejos & Costilla | Urling & Hugh Kingery |
| 1997-058 | 1997 |
Hwy 149 NE of Lake City
| Gunnison | Kim Potter |
| 1998-090 | 1998 |
Uravan
| Montrose | Kim Potter |
| 1998-091 | 1998 |
Calamity Bridge
| Montrose | Kim Potter |
| 1998-092 | 1998 |
Big Gypsum Valley
| San Miguel | Kim Potter |
| 1998-093 | 1998 |
Valco Ponds
| Pueblo | Mark Janos |
| 1998-094 | 1998 |
Big Gypsum Valley
| San Miguel | Kim Potter |
| 1999-096 | 1999 |
Colorado City and Rye
| Pueblo | David Silverman |
| 2001-072 | 2001 |
Grand Junction
| Mesa | Larry Arnold |
| 2002-201 | 2002 |
Lone Dome State Wildlife Area
| Dolores | Andrew Spencer |
| 2002-083 | 2002 |
Navajo State Park
| Archuleta | Tony Leukering, Larry Semo |
| 2005-137 | 2005 |
Valco Ponds
| Pueblo | Brandon K Percival, Nicholas Komar, Cole Wild |
| 2006-024 | 2006 |
Fountain Creek Regional Park
| El Paso | Chris Schoenfelder, Bill Maynard, Brandon Percival |
| 2006-035 | 2006 |
Carrizo Canyon Picnic Area
| Baca | Brian Gibbons |
| 2006-046 | 2006 |
Mesa
| Mesa | Robert Bradley |
| 2007-001 | 2006 |
Valco Ponds
| Pueblo | Brandon Percival, Bill Maynard |
| 2007-019 | 2007 |
Escalante Canyon
| Delta | Nathan Pieplow |
| 2008-013 | 2008 |
Valco Ponds
| Pueblo | Brandon Percival |
| 2008-050 | 2008 |
Chatfield State Park
| Douglas & Jefferson | Glenn Walbek |
| 2009-016 | 2009 |
Walden Ponds/Sawhill Ponds Complex
| Boulder | Maggie Boswell |
| 2009-094 | 2009 |
Valco Ponds
| Pueblo | Brandon Percival |
| 2010-024 | 2010 |
Gunbarrel and Niwot area
| Boulder | Michael Blatchley, Walter Szeliga |
| 2011-026 | 2011 |
Lamar
| Prowers | Jane Stulp |
| 2012-201 | 2012 |
Rio Grande State Wildlife Area
| Rio Grande | Brian Underwood |
| 2012-156 | 2012 |
De Weese Reservoir
| Custer | Brandon K Percival |
| 2013-106 | 2012 |
La Veta
| Huerfano | Beverly Jensen |
| 2013-075 | 2013 |
Florence
| Fremont | Dale Adams |
| 2013-303 | 2013 |
Durango
| La Plata | Todd Myers |
| 2014-186 | 2014 |
Colorado Springs
| El Paso | John Olson |
| 2014-044 | 2014 |
Alamosa
| Alamosa | John Rawinski |
| 2015-038 | 2015 |
Boulder Creek & 75th Street
| Boulder | Ted Floyd |
| 2015-034 | 2015 |
Walsenburg
| Huerfano | Brandon K. Percival |
| 2015-145 | 2015 |
Waterton Canyon
| Jefferson | Scott Somershoe |
| 2020-011 | 2020 |
Fort Collins
| Larimer | Joe Mammoser |
| 2020-072 | 2020 |
CSU Environmental Learning Center
| Larimer | Robert Beauchamp |
| 2020-055 | 2020 |
Arkansas River near Manzanola
| Otero | Eric DeFonso |
| 2021-008 | 2021 |
Del Norte
| Rio Grande | Donna Stumpp |
| 2021-009 | 2021 |
Pike's Stockade
| Conejos | Donna Stumpp |