Another interesting thing I noticed yesterday (5/31/2015) on the
Collinwood BBS was about the Blue-winged Warblers. In the Wayne
County portion of the route, there was some large clearcutting done
around 2000 or so. A few years later, Damien Simbeck had Bachmann's
Sparrows in the regrowing clearcuts for short while. By the time I
adopted the route in 2007(?) it had grown up to the point that the
Bachmann' were gone and the chats had moved in. A few years ago the
regrowth reached the point where it was briefly prime Blue-winged
Warbler habitat, and I had very high counts of this species at a few
stops for several years. This year the BWWAs had thinned out at
those stops, but the species turned up at five other stops farther
down the route where I had not found them before.
The clearcutting in the area was not isolated; quite a bit was done
in that region in the last few years of the previous millennium. So
I am wondering if perhaps the burst of habitat for a few years caused
a population increase, and the birds are moving out into other, less
concentrated, patches of suitable habitat now that the "core" habitat
is getting overgrown.
Bill Pulliam
Hohenwald TN
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