[Tweeters] Anna's vocalization or wing noise?

Patricia Loesche loes at u.washington.edu
Thu Mar 5 12:29:28 PST 2009

Yep -- Anna's makes this sound with its tailfeathers during its
display dive. Here is an article with nice audio and video clips:


On Mar 5, 2009, at 11:52 AM, Ed Swan wrote:

> For about the last month I have heard a single sharp whistle call

> note with no new bird to account for it when I've tried to track it

> down. It happens once and then usually it will be at least half a

> minute to a minute before I hear it again and I'll hear it two to

> three or four times before it stops. Earlier this week I heard the

> sound twice when our Anna's was doing its display. Could this be

> the source?


> Ed Swan

> Vashon Island

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