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Seasons of Wildlife

Sand Pipers at TR

Biologists and volunteers perform seasonal wildlife surveys at Two Rivers National Wildlife Refuge. Check here often for the latest sightings.

Fall Flight Surveys (Duck Counts)

Each week during fall migration biologists from the Illinois Natural History Survey fly over the Illinois and Mississippi Rivers to count the number of waterfowl using the river habitat. These counts estimate the number of ducks and geese seen on the routes only, not the entire refuge. Survey numbers are used to describe general trends in the number of waterfowl resting and feeding on the refuge through the years. Survey results are used by managers, hunters and birdwatchers to monitor the progress of migration. Biologists use the number as a tool to assess waterfowl use (often referred to as carrying capacity) in response to management actions. Waterfowl use is influenced by off-Refuge factors such as continental populations and habitat and weather conditions throughout the flyway. On the refuge, food availability and the extent of human disturbance greatly influence the number of birds present.

To view weekly waterfowl numbers from the Illinois Natural History Survey visit http://www.dnr.illinois.gov/hunting/waterfowl/surveys/Pages/MRAerialSurveys.aspx. The labels in the survey that relate to the refuge are Swan Lake, Gilbert Lake, and Batchtown Refuge.

Volunteer Surveys

Sam, a volunteer for the refuge, visits the refuge nearly 52 weeks per year to perform bird counts. Click on weekly reports below to find out what Sam saw this week.

 
 Sam's Weekly Bird Count
 
2014 2013 2012
Jan. 17, 2014 Jan. 3, 2013 Sept. 7, 2012
Jan. 23, 2014 Jan. 9, 2013 Sept. 12, 2012
Feb. 12, 2014 Jan. 17, 2013 Sept. 20, 2012
Feb. 19, 2014 Jan. 23, 2013 Oct. 4, 2012 
Feb. 26, 2014 Jan. 31, 2013  Oct. 12, 2012 
March 5, 2014 Feb. 6, 2013  Oct. 17, 2012
March 20, 2014 Feb. 14, 2013 Oct. 24, 2012 
March 26, 2014 Feb. 20, 2013  Oct. 31, 2012 
April 1, 2014 March 1, 2013 Nov. 7, 2012 
April 11, 2014 March 7, 2013 Nov. 14, 2012
April 18, 2014 March 15, 2013 Nov. 23, 2012 
April 23, 2014 March 21, 2013 Nov. 29, 2012
  March 29, 2013 Dec. 6, 2012
  April 5, 2013 Dec. 27, 2012
  Nov. 1, 2013  
  Nov. 14, 2013  
  Nov. 19, 2013  
  Nov. 27, 2013  
  Dec. 2, 2013  
  Dec. 24, 2013  

 

Other Volunteer Surveys   

A number of volunteers visit the refuge during spring and fall bird migrations. They see a large variety of bird species as they travel to the different refuge divisions. Check back soon to see their most recent sightings.

October 8, 2014: American Avocet spotted in wetland units along Calhoun Wetlands Rd.

Last Updated: Oct 14, 2014
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