Missawawi Lake

Survey Citation:
COSEWIC. 2014. COSEWIC assessment and status report on the western grebe (Aechmophorus occidentalis) in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. 55 pp. www.registrelep-sararegistry.gc.ca/default_e.cfm

• Type
  shore; boat; air
• Time period
  1991, 2011
• Source
  Report
• Both Western and Clarks?
  N

Count Type	Range	Max	Year
Max Adults	1 to 100	55	1991-2011
Most Recent Adults	1 to 100	?	2011
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:

From Table A.2, maximum counts of breeding Western grebes from surveys mostly conducted during nesting season from June and July from 1991 to 2011 (sourced from Wilson, A. and Smith, P.A. 2013. Distribution and population status of Western Grebes in Canada. Unpublished report for the Canadian Wildlife Service). No break out of data per year or other details.

Survey Citation:
Erickson, M. E. 2010. Persistence and abundance of the western grebe in Alberta. Dissertation. University of Alberta. Edmonton, Alberta, Canada. Same lakes and abundance estimated were checked against Erickson, M. E., C. Found-Jackson, and M. S. Boyce. 2017. Habitat associations with counts of declining western grebes in Alberta, Canada. Avian Conservation and Ecology. 12(1):12. Appendix to Erickson et al 2014 is unavailable but presumed to be the same list of lakes and abundance estimates.

• Type
  shore
• Time period
  26 June 2008, 30 July 2008
• Source
  Dissertation
• Both Western and Clarks?
  N

Count Type	Range	Max	Year
Max Adults	1 to 100	1	2008
Most Recent Adults	1 to 100	1	2008
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:

From Table B.1 and Table C.1, survey method and date for 2008 field season, and latest abundance estimate from 2008, which is the same as maximum abundance estimate. Source of maximum abundance estimate is from the 2008 field data.

Survey Citation:
Environment and Climate Change Canada. 2021. Management Plan for the western grebe (Aechmophorus occidentalis) in Canada [Proposed]. Species at Risk Act Management Plan Series. Environment and Climate Change Canada, Ottawa. 5 iv + 52 pp.

• Time period
  2005, 2016
• Source
  Management plan
• Both Western and Clarks?
  N

Count Type	Range	Max	Year
Max Adults	101 to 500	284	2005
Most Recent Adults	0	0	2016
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:

From Appendix B, data columns are historical high count, high count since 2000, and most recent count. Since minimum count was not stated, I entered the minimum from these columns though it might not be the actual minimum across the span of years reported. Also, there is no detail on years that were excluded from surveying so range of survey years may be inaccurate. Footnote for this lake indicates that for 2015 to 2016, there was no breeding and no Western grebes. Sources are Prescott et al., 2018 and Alberta Environment and Parks, 2018.