Squirrel paint studio #100wcgu

This poem is written for 100wcgu at Julia's Place in response to the Picture Prompt. 

What better way to spend the day
Than a walk around the woods
Listening for the birds above
And rustling the leaves below

But today my mind is wondering why
There's paint on all the trees
What could it be signaling?
Do I need to be afraid?

Perhaps they practise shooting here
Or fire guns loaded with paint
Could it be a target range
Or a squirrel paint studio

Whatever it is will stay unknown
We'll wonder for ever more
If you know then please don't tell
I prefer not being sure