Be as a bird perched on a frail branch that she feels bending beneath her, still she sings away all the same, knowing she has wings.
--Victor Hugo (1802-1885) French author
Above: A Great Blue Heron standing on one leg (the other one's tucked up in there somewhere!) on a frail branch, surveying the scene at Steele Creek Park in Bristol, TN. These birds don't really sing, they have what is described as a "harsh croak" -- you can listen to it here.