Fresno Slough, Mendota Wildlife Area

Survey Citation:
Ivey, G. L. 2004. Conservation assessment and management plan for breeding Western and Clark’s Grebes in California. Unpublished technical report. American Trader Trustee Council, California. . Accessed 15 January 2020.

• Time period
  2000, 2003
• Source
  Conservation Assessment, Management Plan
• Both Western and Clarks?
  N/A

Count Type	Range	Max	Year
Max Adults	1 to 100	presence	2000-2003
Most Recent Adults	1 to 100	presence	2000-2003
Max Nests	1 to 100	presence	2000-2003
Most Recent Nests	1 to 100	presence	2000-2003
Max Chicks	N/A	N/A	N/A
Most Recent Chicks	N/A	N/A	N/A

Comments:

This entry to capture historical record of breeding grebes in CA prior to 2002. There were breeding grebes in "recent years" and noted as colony site (Small 1994). No years provided so I'm estimating 2000-2003 due to paper date of 2004.

Survey Citation:
Robison, K., R. Weems, and D. Anderson. 2008. Western and Clark's Grebe conservation and management in California. Annual report for year three (2007). Report for American Trader and Kure/ Stuyvesant Trustee Councils and National Fish and Wildlife Foundation, California.

• Type
  shore
• Time period
  5 August 2007, late September 2007
• Source
  Report
• Both Western and Clarks?
  Y

Count Type	Range	Max	Year
Max Adults	101 to 500	281	2007
Most Recent Adults	101 to 500	281	2007
Max Nests	N/A	N/A	N/A
Most Recent Nests	N/A	N/A	N/A
Max Chicks	101 to 500	160	2007
Most Recent Chicks	1 to 100	59	2007

Comments:

First survey on 5 August conducted by Diana Humple of Point Reyes Bird Observatory. Second survey in late September (no date provided) by Steve Brueggemann of California Department of Fish and Game. Subsequent reports have their own entries.

Survey Citation:
Robison, K., R. Weems, and D. Anderson. 2008. Western and Clark's Grebe conservation and management in California. Annual report for year four (2008). Report for American Trader and Kure/ Stuyvesant Trustee Councils and National Fish and Wildlife Foundation, California.

• Type
  shore
• Time period
  2008
• Source
  Report
• Both Western and Clarks?
  Y

Count Type	Range	Max	Year
Max Adults	101 to 500	311	2008
Most Recent Adults	101 to 500	311	2008
Max Nests	N/A	N/A	N/A
Most Recent Nests	N/A	N/A	N/A
Max Chicks	101 to 500	150	2008
Most Recent Chicks	101 to 500	150	2008

Comments:

Data from Table 3 collected by S. Brueggemann (CDFG). Date of surveys not provided. Productivity rate from # of adults in sample and # of young in sample. Estimated total # of adults is entered here. No other information provided. Subsequent reports have their own entries.

Survey Citation:
Robison, K., R. Weems, D. Anderson, and F. Gress. 2010. Western and Clark's Grebe conservation and management in California. Annual report (2009). Report for California Institute of Environmental Studies, Davis, California.

• Type
  shore
• Time period
  October 21, 2009
• Source
  Report
• Both Western and Clarks?
  Y

Count Type	Range	Max	Year
Max Adults	101 to 500	243	2009
Most Recent Adults	101 to 500	243	2009
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:

Data from Table 1. No chick count #s but productivity is calculated as 0.18. Data source is S. Bruggemann (CDFG).