Bill Williams River National Wildlife Refuge
- Lake name:
- Bill Williams River National Wildlife Refuge
- Location:
- Arizona
- Latitude:
- 34.2891
- Longitude:
- -114.0744
- Basin type:
- non-reservoir
- Dam completion date:
- 1933
- Management agency:
- U.S. Fish and Wildlife Service
- Region associations:
- Colorado River; Havasu Lake NWR
- Comments:
- 6100 acres of Havasu Lake National Wildlife Refuge was carved out as Bill Williams NWR in 1993.
Summary of Surveys (3)
Survey Citation:
Bill Williams River National Wildlife Refuge Important Bird Area (IBA). 2011. Arizona Important Birds Area Program website. Accessed 11 October 2023.
-
Time period
2000 -
Source
Website -
Both Western and Clarks?
N
| Count Type | Range | Max | Year |
|---|---|---|---|
| Max Adults | 1 to 100 | 88 | 2000 |
| Most Recent Adults | 1 to 100 | 88 | 2000 |
| 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:
This is a Continental IBA for Clark's grebes. 44 breeding pairs of Clark's grebes are reported for 2000. 475 non-breeding individuals were counted in 2011, I did not enter this. No other information as this is a website describing this IBA. Western grebes migrate through.
Survey Citation:
Manning, A. 2006. Colony list, unpublished data.
-
Time period
2006 or prior -
Source
Summary -
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 | 2006 or prior |
| Max Nests | 1 to 100 | presence | 2006 or prior |
| Most Recent Nests | 1 to 100 | presence | 2006 or prior |
| Max Chicks | N/A | N/A | N/A |
| Most Recent Chicks | N/A | N/A | N/A |
Comments:
Unpublished data from Ann Manning with the Utah Division of Wildlife, forwarded by Gary Ivey. Ivey said year saved was 2006 but otherwise unknown when this list was determined by Manning, hence year noted as 2006 or prior. This is on a list of known colonies of Western and Clark's grebes. No year nor other info provided.
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 | 1 to 100 | 1 | between 1993-2000 |
| Most Recent Nests | 1 to 100 | 1 | 2006 or prior |
| Max Chicks | N/A | N/A | N/A |
| Most Recent Chicks | N/A | N/A | N/A |
Comments:
Surveys were conducted between 1993 and 2000 for this atlas. Atlas volunteer surveyors found a Western grebe nest with eggs in July (no year indicated). Clark's grebes also nest here, first observed nesting in 2001.