Walden Reservoir
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View Surveys (3)
View Sources (2)
Grebe Survey Summary
- Max Adults: 233
- Year: 2010
- Most Recent Adults: 233
- Year: 2010
- Survey Type: Shore; Boat
- Most Common Threats Reported: N/A
- Lake name:
- Walden Reservoir
- Location:
- Colorado
- Latitude:
- 40.732853
- Longitude:
- -106.299876
- Basin type:
- reservoir
- Management agency:
- Bureau of Land Management
- Lake use:
- irrigation
- Comments:
- Shallow irrigation reservoir.
Surveys (3)
Survey Citation:
Cavitt, J. F., S. L. Jones, N. M. Wilson, J. S Dieni, T. S. Zimmerman, R. H. Doster, and W. H. Howe. 2014. Atlas of breeding colonial waterbirds in the interior western United States. Research Report, U.S. Department of the Interior, Fish and Wildlife Service, Denver, Colorado.
-
Type
shore -
Time period
2 August 2009, 12 June 2010 -
Source
Report -
Both Western and Clarks?
N
| Count Type | Range | Max | Year |
|---|---|---|---|
| Max Adults | 101 to 500 | 233 | 2010 |
| Most Recent Adults | 101 to 500 | 233 | 2010 |
| Max Nests | 101 to 500 | 150 | 2010 |
| Most Recent Nests | 101 to 500 | 150 | 2010 |
| Max Chicks | N/A | N/A | N/A |
| Most Recent Chicks | N/A | N/A | N/A |
Comments:
Hundertmark is observer. For 2010, nests X2 gave an estimate of breeding adults as 300 but I entered the actual count of 233. Conducted as part of Western Colonial Waterbird Survey (WCWS), a breeding survey of 18 species from May to July 2009 to 2011, resulting in this Atlas. Survey date given here is the only date provided.
Survey Citation:
Cavitt, J. F., S. L. Jones, N. M. Wilson, J. S Dieni, T. S. Zimmerman, R. H. Doster, and W. H. Howe. 2014. Atlas of breeding colonial waterbirds in the interior western United States. Research Report, U.S. Department of the Interior, Fish and Wildlife Service, Denver, Colorado.
-
Time period
18 June 2003, 23 June 2005 -
Source
Report -
Both Western and Clarks?
N
| Count Type | Range | Max | Year |
|---|---|---|---|
| Max Adults | 1 to 100 | 57 | 2005 |
| Most Recent Adults | 1 to 100 | 57 | 2005 |
| Max Nests | 1 to 100 | 50 | 2005 |
| Most Recent Nests | 1 to 100 | 50 | 2005 |
| Max Chicks | N/A | N/A | N/A |
| Most Recent Chicks | N/A | N/A | N/A |
Comments:
Unknown observers. Historical record included in the Atlas. For 23 June 2005, nest #s X2 for estimate of breeding adults (100) but I entered the actual count number.
Survey Citation:
Giroir, G.P. and T. Leukering. 1999. Breeding distribution and numbers of Eared, Western, and Clark's grebes in Colorado. J. Colorado Field Ornithologists 33:83-90.
-
Type
shore; boat -
Time period
23 May 1998, 28 July 1998 -
Source
Occasional Paper -
Both Western and Clarks?
Y
| Count Type | Range | Max | Year |
|---|---|---|---|
| Max Adults | 0 | 0 | 1998 |
| Most Recent Adults | 0 | 0 | 1998 |
| Max Nests | N/A | N/A | N/A |
| Most Recent Nests | N/A | N/A | N/A |
| Max Chicks | N/A | N/A | N/A |
| Most Recent Chicks | N/A | N/A | N/A |
Comments:
One of 93 lakes, ponds, and reservoirs surveyed in CO for 3 species of grebes. No Western nor Clark's grebes found but entered this as zero because this lake was surveyed as part of WCWS.