One possibility. The bird might have been a "floater." I've sometimes 
encountered individual birds at about this time of year in "odd" habitats. 
They typically sing in an area for a couple of weeks, then disappear. I 
presume such individuals were unsuccessful at attracting a mate, and move 
around trying to find one and breed.

----Bill Eddleman, Cape Girardeau
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At 01:57 PM 7/9/2005 -0500, Robert Fisher wrote:
>I went to Martha LaFitte today to check out reports of a Swinson's Warbler 
>having been heard there. I arrived a little before 9:00 a.m. and played a 
>Swainson's Warbler tape near where the bird was first reported having been 
>heard. I continued on around the trail and encountered Kristi Mayo. She 
>said she had been there since about 8:30 a.m., but had not heard the bird. 
>Kristi then conducted me to various spots where the bird may have been 
>heard, and I played the tape at each of those spots. Finally, I played the 
>tape near the employees' parking lot, from which I understood Craig 
>Hensley had heard the bird.
>
>I go not responses.
>
>If a Swainson's Warbler really has been singing at Martha LaFitte, it is 
>not surprising that it might be singing only sporadically at this time of 
>year. (I think of Swainson's Warbler as a fairly early singer on its 
>traditional breeding grounds -- not as early as Pine Warbler and perhaps 
>not quite as early as Yellow-throated Warbler and Louisiana Waterthrush, 
>but fairly early nevertheless.) Song could well be tapering off by early 
>July. Nevertheless,  if the bird were really territorial in the area of 
>Martha LaFitte where I played the tape today, I would have expected a response.
>
>
>Bob Fisher
>Independence, Missouri
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>
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