Thanks for the heads-up!  As I was leaving for work in the pre-dawn dark 
this morning, I heard a sound over my yard new to me, moving from south 
to north, that wasn't the crow commute I usually hear at 6:30am.   I 
realized:  Wow! that must be some of the ducks he was talking about!  
Way cool!   Couldn't see a thing in the sky, but the sound was delightful.

I don't know if I would have figured it out without the post.

Georgia McDonald   Towson, Balt Co

Edward Boyd wrote:
> About 30 years ago I had the pleasure ------- witnessing one of the true spectacles of spring when tens of thousands of diving ducks launch off the bay in steady streams and vacate the Chesapeake for their summering grounds, their calls filling the skies with sound.