Ventriloquism in Birds?

["Neville Recording" nevillerecording]

The bird I am most familiar with that has some ventriloquial qualities is the 
Sooty Grouse (Blue Grouse) Dendragapus obscurus. The sound seems to disperse in 
many directions making it difficult to pinpoint the bird. In practical terms, 
its difficult to know where to aim the microphone. The loudest sound is often 
at variance with the actual location of the bird. 

John Neville
British Columbia Canada