3. Snakes. Snakes are among the deadliest animals on Earth, responsible for an estimated 50,000 human deaths per year. Most snake-related deaths occur in rural areas of developing countries where access to medical care is limited, and venomous snakes are prevalent. I guess it depends on what one means by filthy—lots of animals are filthy in the just plain “dirty” sense of the word. For me the animal that fits the “oh gross” sense of the word’s meaning: parasitoid wasps. Most creatures do not want to be eaten and many go to extraordinary lengths to avoid it. While it may be subjective to label any animal as the “dirtiest,” there are a few contenders that can certainly be considered for this title. In this article, we will explore some of these contenders and discuss the reasons behind their unclean reputation. 1. Pigs: Pigs often top the list when discussing the dirtiest animals. Matt Jones. PhD candidate, Entomology, Washington State University. Hands down, the filthiest animals must be dung beetles. They spend their adult life flying around in search of fresh feces. When What Is The Top 10 Cleanest Animal? Pigs. Clean enough to be in your house. Cats. Cats bathe all the time. Squirrels. 49 points – added 10 years ago by kris – 2 comments. Deer. One of the cleanest wild animals. Fish. 34 points – added 10 years ago by kris – 1 comment. It is a fact known to all that there are more than 2 million animals over the globe. Since the dinosaurs were found on earth, there was no halt to the evolution of different types of animals. We can’t deny that there is a multitude of species and kinds of animals in the world. It is rather tough to segregate animals against human beings. The 13 Statistics About Dangerous Animals in the UK. Roughly five people are killed yearly in incidents relating to cattle. Around two people yearly are killed by dogs. Seagulls maimed several people and killed at least one dog. Bee, wasp, and hornet stings kill between two and nine people yearly. An Iranian man known as “the world’s dirtiest man,” who reportedly hadn’t showered for 60 years, died Sunday at the age of 94, according to Iranian state media reports cited by the New York Post. VzKkzP.