7 audio discs (8 1/2 hr.) : CD audio, digital ; 4 3/4 in. + 1 computer disc (PDF ; 4 3/4 in.)
digital rdatr
optical rdarm
audio file rdaft
CD audio
Note
Supplemental enhancement PDF accompanies the audiobook.
Compact discs.
Performer
Read by Allyson Ryan.
Summary
Here is the never-before-told story of how a group of scientists used nearly every branch of science to understand bird migration--from takeoffs to flight paths and behaviors, to challenges in reaching their destinations.
