As our 4 year old Daughter was growing up we taught her to,
" Always look both ways before crossing the street ! " Around that same time some critter was invading our backyard, eating up the fruit in our garden.
I set out a Cage Trap at a hole in the fence to see what it was that kept sneaking into our yard at night.
We ended up catching so many Possum, that I started spray painting their tails with a different can of paint just before they
"Escaped". (To see if the same culprits were getting caught over and over?)
After running the gamut of color choices in spray paint, I decided we had a Possum problem.
............. 
That week riding in the car, our Daughter called out from the back seat.....
"Look Daddy, It's the Red Tailed Possum,
He must have forgot to look both way's before crossing the street!"

Doug