I saw a  male, hybrid warbler in mid to late April at Glacier Ridge Metro
Park just outside of Dublin,Ohio.  It appeared to be a cross of a  Common
Yellowthroat and a Yellow Warbler.  It was singing a complex song that was
different than the wel- documented song for the male Common Yellowthroats.
I got a good look at it and it finally flew away from this tree toward the
cattails in the wetlands section.   Just moments a rough-legged hawk cruised
over that very same tree and myself since I was still in the area.  In fact,
I reported it the Ornithology Lab at Cornell Univ. closer to the time
mentioned.   In the literature online, there was a hybrid of these 2 species
reported in the San Francisco Bay area of California...       This
individual warbler was a very hyper fellow,constantly turning his face and
moving a branch or two away from the objectives of my
binoculars.                      Gary

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