Through a Window Darkened

Through a window, darkened,
a scratching sound was heard.
Could it be coming from,
a large, aggressive bird?

Or was it from the branches,
of a weeping willow tree.
Our imagination, in effect,
when it's dark and we can't see.

Looking in the darkest night,
was our task to do.
We worked extra hard,
finding the noise, came to,

through a darkened window,
the scratching sound we heard,
was from willow tree branches,
It was not from a bird.