[CT Birds] A little good news from Michigan

Mntncougar at aol.com Mntncougar at aol.com
Tue Oct 4 14:18:58 EDT 2011

Kirtland’s Warbler Continues to Exceed Recovery Goal

According to a press release from the Michigan DNR, biologists,  
researchers and volunteers in Michigan observed 1,805 singing male Kirtland's  Warbler 
during the official 2011 survey period -- 1,747 males were observed in  
2010. The population has not increased or decreased by more than 5 percent 
since  2007. The lowest numbers were recorded in 1974 and 1987, when only 167 
singing  males were found. 

The Kirtland's Warbler survey is conducted each year  during the second and 
third weeks of June when the birds are defending their  nesting 
territories. Warblers are detected by listening for their songs. The  songs can be 
heard at distances up to one-quarter mile, providing an excellent  way to detect 
the birds with minimum disturbance. Only the males sing, so  estimates of 
breeding population size are obtained by doubling the number of  singing 
males recorded, based on the assumption that each male has a mate in its  
territory. The 2011 survey was a joint effort by the DNR, U.S. Forest Service,  
U.S. Fish and Wildlife Service, Michigan Department of Veterans and Military  
Affairs, Michigan Audubon Society, and citizen volunteers. 

This year,  singing males (numbers in parentheses) were found in 11 
Northern Lower Peninsula  counties: Alcona (221), Clare (84), Crawford (315), Iosco 
(134), Kalkaska (53),  Montmorency (32), Ogemaw (569), Oscoda (261), Otsego 
(31), Presque Isle (5), and  Roscommon (65). Surveyors identified 35 
singing males in seven Upper Peninsula  counties: Alger (1), Baraga (2), Chippewa 
(14), Delta (11), Luce (3), Marquette  (2), and Schoolcraft (2). 
Twenty-three additional singing males were observed  outside Michigan in Wisconsin (21) 
and Ontario (2). 

As the amount of  nesting habitat has stabilized, the population of 
warblers has also stabilized  in the core of the range: northern Michigan's jack 
pine barrens ecosystem.  

More information about the CTBirds mailing list