Science Advances

Supplementary Materials

This PDF file includes:

  • fig. S1. Typical drumsticks manufactured by palm cockatoos (left) and a modified seedpod (right).
  • fig. S2. Sound properties and spacing of drumming.
  • fig. S3. Log of mean intertap interval versus log variance over 131 sequences of drumming by 18 male palm cockatoos.
  • fig. S4. Correlograms for seven longest drumming sequences.
  • Legends for movies S1 and S2

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Other Supplementary Material for this manuscript includes the following:

  • movie S1 (.mov format). A male palm cockatoo drumming on a nest hollow using a seedpod.
  • movie S2 (.mov format). A male palm cockatoo drumming on a hollow tree stump using a drumstick fashioned from a tree branch.

Files in this Data Supplement: