[Tweeters] A screw loose?

Marcia Ian gnudle at icloud.com
Sat Sep 29 15:58:44 PDT 2018

One of the Anna’s hummingbirds at our feeder yesterday made a strange clacking sound in flight, resembling the sound made by a playing card inserted into the spokes of a kid’s bike for the purpose. Any thoughts as to what might be the cause?

Marcia Ian

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