…”.their secret is coiled like a snake inside their chests. 
Rather than simply connecting the lungs to the outside world,
[the] windpipe, loops along the breastbone,
forming a tube which, if stretched out, is almost as long
as the bird itself. 
The result is pure magic,
guaranteed to raise goose flesh
on someone hearing it for the first time. 
WHICH BIRD?
WHICH AUTHOR? WHICH BOOK?