I'm afraid that the human being is the dirtiest animal in the world by far. No other creature on earth uses it's environment to the detriment of itself and any other unfortunate creature who shares that environment. All other creatures use their environment only as required for survival, and no more. Observe the filthy haze over any major city in the world or read up on the Great Pacific Garbage Patch, links below.
Ocean City, MD
the dirtiest insect int he world is an roach because its been everywhere and also it carries many disease
MONREITH ANIMAL WORLD IN SOUTHWEST SCOTLAND
The Blue Whale Is The Largest Animal In The World .
The blue whale is the largest animal in the world.
The peregrine falcon is the world fastest animal
YOU!!! are the Dumbest animal in the world...
Bullen's Animal World was created in 1969.
Bullen's Animal World ended in 1986.
The Animal World - film - was created in 1956.
you mean what was the fattest animal in the world? by the way i don't consider animals fat but if you say so the ''fattest" animal in the world is the elephant.
You can not have a baby on Animal Crossing: Wild World