Cornell's Macaulay Library of Natural Sounds has 65 recordings of Hooded Warbler on its web site. Among them I found recordings of an alternate song that is very similar to the song I heard this morning at Crosby Park in St. Paul. A good example is the recording with catalog number 68970 (recorded by William W. Gunn in Ontario in 1952). (Go to http://macaulaylibrary.org/index.do, click the "Audio" box, and enter "Wilsonia citrina" without the quotation marks in the "Find" box. This particular recording is number 45 in the list.)
Now that I know that song, I hope to recognize it at Murphy-Hanrehan.
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