I was wondering if the copper in the water of the bird bath could be toxic to the birds? I observed 2 baby bluebirds, and the momma bluebird, drink a lot of water, staying at the birdbath for a long time, and then just shortly later they died. I know when poisoned, often the victim becomes very thirsty. I had pennies in my birdbath last year, this year I had a piece of copper tube. I am worried that perhaps they had become poisoned by what I did...
