First thing I thought - this is Earth in the far future, when koalas are lumbering horned beasts and vampire bats are flightless, small fast horned beasts. Also robots rule the world! That is an awesome future, I must say.
Reminds me of the senior prank pulled by the class ahead of mine in high school. They released 3 piglets (or were they roosters? One of the two) onto the campus, each labeled with tags numbered 1, 2, and 4. I think you can guess how that went.