Imperial National Wildlife Refuge
- Lake name:
- Imperial National Wildlife Refuge
- Location:
- Arizona
- Latitude:
- 33.000171
- Longitude:
- -114.488685
- Basin type:
- reservoir
- Dam completion date:
- 1938
- Primary vegetation for nesting:
- tamarisk
- Management agency:
- U.S. Fish and Wildlife Service; Bureau of Reclamation; Imperial Irrigation District
- Region associations:
- Colorado River; Southwest Arizona NWR Complex; Cibola NWR
- Comments:
- 30 miles along the lower Colorado River. Part of the Southwest Arizona National Wildlife Refuge Complex along with Cibola NWR. Wetlands created with creation of the Imperial Dam in 1938. Imperial NWR includes various lakes and wetlands along the Colorado River so the refuge as a whole is entered seperately from Imperial Reservoir and Martinez Lake.
Summary of Surveys (2)
Survey Citation:
Jenness, D. 2020. Extreme water level fluctuations limit breeding of western and Clark's grebes at San Carlos Lake, Arizona. Arizona Birds - Journal of Arizona Field Ornithologists. Volume 2020; Corman, T. E., and C. Wise-Gervais. 2005. Arizona Breeding Bird Atlas. University of New Mexico Press, Albuquerque, NM. (Book)
-
Time period
N/A -
Source
Article -
Both Western and Clarks?
N
| Count Type | Range | Max | Year |
|---|---|---|---|
| Max Adults | 1 to 100 | presence | 2006 or prior |
| Most Recent Adults | 1 to 100 | presence | ? |
| Max Nests | N/A | N/A | N/A |
| Most Recent Nests | N/A | N/A | 2006 or prior |
| Max Chicks | 1 to 100 | 1 | ? |
| Most Recent Chicks | 1 to 100 | 1 | ? |
Comments:
Not a survey but an observation of a brood with one chick observed in January (Rosenberg et al. 1991) as an example of an early nesting period. The year is not stated.
Survey Citation:
Corman, T. E., and C. Wise-Gervais. 2005. Arizona Breeding Bird Atlas. University of New Mexico Press, Albuquerque, New Mexico, USA.
-
Time period
1993, 2000 -
Source
Book -
Both Western and Clarks?
Y
| Count Type | Range | Max | Year |
|---|---|---|---|
| Max Adults | 1 to 100 | presence | 2006 or prior |
| Most Recent Adults | 1 to 100 | presence | between 1993-2000 |
| Max Nests | N/A | N/A | N/A |
| Most Recent Nests | N/A | N/A | 2006 or prior |
| Max Chicks | 1 to 100 | 1 | between 1993-2000 |
| Most Recent Chicks | 1 to 100 | 1 | between 1993-2000 |
Comments:
Surveys were conducted between 1993 and 2000 for this atlas. Volunteer surveyors for the atlas noted a Western grebe adult with with chick on 1 January (no year stated) as evidence of a longer breeding period in the year. Clark's grebes suspected of nesting here too.
Sources of Information
- Jenness, D. 2020. Extreme water level fluctuations limit breeding of western and Clark's grebes at San Carlos Lake, Arizona. Arizona Birds - Journal of Arizona Field Ornithologists. Volume 2020; Corman, T. E. and Cathryn Wise-Gervais. 2005. Arizona Breeding Bird Atlas. University of New Mexico Press, Albuquerque, NM.
- Corman, T. E. and Cathryn Wise-Gervais. 2005. Arizona Breeding Bird Atlas. University of New Mexico Press, Albuquerque, NM.
- Imperial National Wildlife Refuge
- Arizona Guide to Imperial National Wildlife Refuge
- Imperial National Wildlife Refuge Recreation