The cranes have a lovely song and I am inspired to get a digital audio recorder so I can record their song to submit to NPR's Sound Clips.
Just before sunset, the cranes gathered in a field east of the lake, thousands of them, and they all stood facing west, as though they were watching the sunset. Then, at twilight, there was a mass ascention, all of the cranes singing and flapping - it sounded like a some sort of industrial process it was so loud. They all flew over to the lake shore where apparently they spend the night so that they only have to watch 180 degrees for predators, mostly bobcats and coyotes.
It was very soothing to see such abundant life, to listen to the honking geese, the hooting owls and the trill of the cranes, and to take photographs. The only negative of the experience was the mud - thick brown mud that somehow cakes several inches on the bottom of your shoes - but that was a minor inconvenience. I am definitely going back.