Which animal is most successful in the world?

Answer 1

Insects. Non-animal species would be bacteria. Bacteria are even found frozen in Antarctic ice and living in boiling hot springs. Insects are in almost as many places.

This depends upon how big the "group" is. Among the insects (which includes ants, butterflies, locusts), the beetle has the widest variety and occupies the most diverse array of ecological niches. Bacteria are prokaryotes, they are not classified in the kingdom of animals. Animals are multicellular (metazoans). The most successful vertebrate would be the fish. There are way more fish than there are birds, reptiles, and mammals (including cetaceans) combined, and fish date back to the Ordovician, perhaps earlier.

Answer 2

Other than humans the only other ones are insects, especially cockroaches. === === Mice are probably more successful than humans. There are way more mice than there are people, and they have been around much longer. Mice have also killed millions of people (consider the Bubonic Plague). Of course, cockroaches are more successful yet. Cockroaches occupy a wide variety of environments, and are very hardy creatures.

Our species has only been around 200,000 years. That's nothing. Sure, we think we're pretty hot stuff right now, but we're exhausting fresh water supplies and fossil fuels as though there were no tomorrow. Without substantial improvements in technology, the human population is destined to plummet. With our current technology, this planet can reasonably support about two billion people. That means more than five billion (there are almost seven billion now) will meet an uncomfortable end. Of course, that end is at least decades away, perhaps a century. Humans are considered successful because we are at the top of the food chain. I have eaten bear, mountain lion, elk, antelope, deer, rabbits, pigs, lambs, fish and shell fish, and insect byproducts (honey). We also occupy a wide variety of niches. Humans can be found on every continent, including Antarctica. Insects are successful because they are so numerous. Consider the mosquito. It is nearly the same now as it was two hundred million years ago. That is a million times the age of our species. And insects date back to the silurian.

Answer 3

I think it is the bacteria because it came before all animals but they are still present.