Kids' Inquiry of Diverse Species
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brown creeperCerthia americana
Here's the song, sung in the Ponderosa Pines near the top of Oak Creek Canyon of Central Arizona, 4/10/99. The song is so high (between 4500 and 8000Hz) that many humans just can't hear it at all!
Douglas Von Gausig (recordist; copyright holder), Naturesongs.com
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