Program Information — Series 1 & 2
Click on a program in the right-hand column to see a description and program notes.


Birds also use their air sacs as chambers to make the sounds they produce more resonant. Some even use their air sacs to make the sounds on their own.

The recordings of both the blue grouse and sage grouse are from the CD collection Bird Songs of California produced by the Cornell Laboratory of Ornithology.
The cellist is Pablo Casals, playing J. S. Bach's Suite No. 1 for Unaccompanied Cello.

Series 1
Vocal Range
Importance of Song
Avoiding Monotony
Learning Song
Hip Hop Mimicry
Hummingbird Complexity
Syrinx Anatomy
Internal Duets (Cardinal)
Internal Duets (Cowbird)
Internal Duets (Thrushes)
Syrinx & Pan Pipes

Series 2
Songs & Calls
Call Repertoires
Alarm Calls
Mobbing Calls
Call Notes
Cross-Species Alarms
Lungs & Air Sacs
Circular Breathing