Supporting Online Material

Aeroelastic Flutter Produces Hummingbird Feather Songs

Christopher J. Clark, Damian O. Elias, Richard O. Prum

Materials/Methods, Supporting Text, Tables, Figures, and/or References

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  • Materials and Methods
  • SOM Text
  • Fig. S1
  • Table S1

Images, Video, and Other Other Media

Movie S1
This narrated movie shows different ways feathers can flutter and produce sound, including the four types of modes of flutter depicted in Fig. 1G. Video clips of feathers in the wind tunnel are 30 frames per second (fps) clips with accompanying sound, and high-speed videos (23,121 fps) that show the flutter of the feather. Shot with a Sony Handicam HD and a Miro Ex4 high-speed camera; edited in Windows Movie Maker.
Movie S2
This narrated movie is a demonstration of sympathetic vibrations in Anna's Hummingbird R4 that amplify the loudness of the sound produced by R5 (i.e., Fig. 3). Sound recordings of the displays of Anna's Hummingbird (Calypte anna) with and without R4 are played; then a demonstration of the amplification effect that R4 has when placed behind R5 is shown, both with conventional video (30 fps, including sound) and high-speed video (23,121 fps). Finally SLDV scans of Anna's R5 are shown, demonstrating that R4 vibrates at the same frequency as R5 when placed behind R5, whereas a flat plate does not. Shot with a Sony Handicam HD and a Miro Ex4 high-speed camera; edited in Windows Movie Maker.