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Published on Dec 14, 2012
The first 24 seconds are the wing-beats of Ruby-throated Hummingbird. The rest of the video is the sound of Black-chinned Hummingbird wing-beats. Notice the difference in pitch. I would be happy to have anyone weigh in on the relevance of this field mark. Listen closely to the second part of the tape and you will hear the call of the other unusal visitor, Red-breasted Nuthatch.