Prompted by Bill Evans' alert, I set a microphone outside (Snyder Hill
Rd) last night a listened to a fair sample of migrating birds. Between
10 and 12 PM I noted 6 Swainson's Thrushes, 2 Gray-cheeked Thrushes, 1
Wood Thrush, 1 Dickcissel, a good number of high "zeeps" and quite a
number of calls that I could not identify.
I am only able to identify a few calls by ear; the rest I have to rely
on comparing the sonograms (I recorded the calls) with those on Bill's
"Flight Calls of Migratory Birds" and Andy Farnsworth's "Rosetta
Stone". And there is the background cacophony of all the local insects
to contend with.
I find it especially cool when there are multiple calls of a single
bird as it approaches, flies overhead, and then continues into the
distance. And then I realize that what I am hearing is just one small
thread in a broad river of birds moving south.
Bob McGuire
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