Lake Osakis

Survey Citation:
Nuechterlein, G. L., and D. Buitron. 1998. Interspecific mate choice by late-courting male western grebes. Behavioral Ecology 9:313–321.

• Time period
  April 1991, July 1993
• Source
  Journal Article
• Both Western and Clarks?
  Y

Count Type	Range	Max	Year
Max Adults	101 to 500	400-600	1991-1993
Most Recent Adults	1 to 100	?	1993
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:

A study on interspecific mate choice used field playback experiments to see if by late-courting Western grebe males paired with female Clark's grebes. The sites were grebe colonies at Lake Osakis, Minnesota and Marshy Point of Lake Manitoba in Canada. The breeding population of 400-600 was mentioned for Lake Osakis with no other details.

Survey Citation:
Pfannmuller, L., G. Niemi, J. Green, B. Sample, N. Walton, E. Zlonis, T. Brown, A. Bracey, G. Host, J. Reed, K. Rewinkel, and N. Will. 2017. The First Minnesota Breeding Bird Atlas (2009-2013).

• Type
  shore
• Time period
  ~June 2009, ~June 2013
• Source
  Atlas
• Both Western and Clarks?
  N

Count Type	Range	Max	Year
Max Adults	1 to 100	presence	2009-2013
Most Recent Adults	1 to 100	?	2013
Max Nests	1 to 100	presence	2009-2013
Most Recent Nests	N/A	?	2013
Max Chicks	1 to 100	presence	2009-2013
Most Recent Chicks	N/A	?	2013

Comments:

For this first MNBBA, point counts were conducted in atlas blocks from 2009 to 2013. Breeding lakes are not named, only blocks with confirmed breeding (evidence or observation of nesting, nest building, nest protecting, eggs, chicks, etc.) were selected from the interactive map. Blocks T128R35c and d.

Survey Citation:
Bardon, Karl J. 2002. High Counts of Birds in Minnesota: A Compilation of the Highest Single Count Totals for Regular Species. Minnesota Ornithologist’s Union Occasional Papers, no. 4. Minneapolis: Minnesota Ornithologists’ Union.

• Time period
  summer 1984, 26 July 2021
• Source
  Database
• Both Western and Clarks?
  N

Count Type	Range	Max	Year
Max Adults	501 to 1000	700-800	1987
Most Recent Adults	101 to 500	143	2021
Max Nests	501 to 1000	550	2008
Most Recent Nests	1 to 100	75	2017
Max Chicks	N/A	N/A	N/A
Most Recent Chicks	N/A	N/A	N/A

Comments:

Peder Svingen is the summer Seasonal Report (SR) co-editor along with Ann Kessen for The Loon and maintains a high count database for bird surveys. This data from the summer season and adults were reported as pairs for the maximum adult count (350-400 pairs). In text citation would be (Bardon 2001, and unpublished updates, P. Svingen).

Survey Citation:
Guertin, David S., and Lee A. Pfannmuller. 1985. “Colonial Waterbirds in Minnesota: An Update of their Distribution and Abundance.” Loon 57: 67–78.

• Time period
  1981, 1983
• Source
  Report
• Both Western and Clarks?
  N

Count Type	Range	Max	Year
Max Adults	101 to 500	>400	1981
Most Recent Adults	1 to 100	?	1983
Max Nests	101 to 500	>200	1981
Most Recent Nests	N/A	?	1983
Max Chicks	N/A	N/A	N/A
Most Recent Chicks	N/A	N/A	N/A

Comments:

This report updates the MNDNR Minnesota Colonial Waterbird Nesting Inventory for 1981 to 1983. The Lake Osakis colony was the largest known in the state, composed of 201 to 300 nests or pairs in 1981. There is no information about 1982 and 1983 status.