This morning while filling the feeders I kept hearing a new bird song ,I asked 
Carol to come and listen and it stopped. Later looking out the kitchen window 
I found a bird that at first I wasn't sure of, but it turned out to be a female 
Yellow-rumped Warbler. This is early here on the lake. I checked Thayers 
North American bird songs and still don't know what the other bird was. 
For those who might be interested, I've posted a few pic's of the Beaver thats 
here on lake Pauline.
http://carolandpetes.blogspot.com/2008/05/beaver-castor-canadensis.html 

Good Birding

Carol and Pete
Lake Pauline
Ludlow Vt
http:carolandpetes.blogspot.com