Smooth as Ice

I see the woods behind,
And the garden below.
But there
In the middle of the garden,
I see one of a bird's favorite places.

What is it down there?
Can it be?
A birdbath!
Is it filled?
Will the water be cold?

Happy birds,
Flying in flocks
Down from their perches.

Hey, lets go in!
Last bird in is a rotten egg!

The birdbath, smooth as ice 
Won't last long
In this sun.
Cause it is made of ice.

Birds come down from the tree,
Happy as ever when they leave.

How many were there?
How many were happy?
No one knows except, the birds.