Bert Bailey shares with us an experience:

>It was still dark when it began with one bird, the early riser, singing
>a note, maybe two.  It repeated this, and did so again, and after a few
>times a reply finally came from a bird (annoyed?) on another branch

I am reminded of a similar experience of mine in Lava Tree National
Monument on the Big Island of Hawaii.  I had a micro- cassette recorder
with me that I used to record notes and ambient sounds.  There were a lot
of birds hidden in the dense foliage, singing.  I taped some calls, and
when I played them back to listen, provoked a storm of response from the
birds...

len.