Tilley A Reservoir
- Lake name:
- Tilley A Reservoir
- Location:
- Alberta
- Latitude:
- 50.5
- Longitude:
- -111.63
- Surface area (km2):
- 4.6
- Basin type:
- reservoir
- Lake use:
- irrigation
- Region associations:
- Tilley Slough; Bow River
- Comments:
- Part of the Tilley Slough area, a complex of sloughs, reservoirs, and lakes. Artificial islands were built to enhance waterfowl nesting.
Summary of Surveys (1)
Survey Citation:
Prescott, D. R. C., J. Unruh, S. Morris-Yasinski, and M. Wells. 2018. Distribution and abundance of the western grebe (Aechmophorus occidentalis) in Alberta: an update. Alberta Environment and Sustainable Resource Development, Fish and Wildlife Policy Branch, Alberta Species at Risk Report No. 160, Edmonton, AB. 23 pp.
-
Type
boat -
Time period
1998, 2015 -
Source
Report -
Both Western and Clarks?
N
| Count Type | Range | Max | Year |
|---|---|---|---|
| Max Adults | 1 to 100 | 6 | 2010 |
| Most Recent Adults | 0 | 0 | 2015 |
| Max Nests | 1 to 100 | presence | 1998 |
| Most Recent Nests | 0 | 0 | 2015 |
| Max Chicks | 1 to 100 | presence? | 1998 |
| Most Recent Chicks | 0 | 0 | 2015 |
Comments:
Sources are eBird (accessed Nov 2015 and Dec 2016) and FWMIS (Accessed Nov 2015 including field surveys from 2015 and 2016). 1983. This report is an update of Western grebe distribution in Alberta based on previous provincial status reports, additional breeding records (between May 1 to August 31) through end of 2014 from new sources. Lakes were visited in 2015 and 2016 for occupancy and habitat conditions. In a given year, if there are multiple sources of data, the highest count was given. From the Appendix, I entered only lakes (67) with evidence of breeding (either chicks or nests, but doesn't specify which and no nest nor chick numbers provided). Otherwise, 318 lakes supported adult grebe populations. This report compiled a list of 35 priority lakes for grebe surveys and management actions through the provincial recovery plan based on high population and habitat scores. New lakes with breeding reveal a changing system of lake occupancy and possibly higher populations than previously thought in Alberta.