How many animals are alive in the world?

Answer 1

Vertebrate Animals

Mammals 5,490

Birds 9,998

Reptiles 9,084

Amphibians 6,433

Fishes 31,300

Total Vertebrates 62,305

Invertebrate Animals

Insects 1,000,000

Spiders and scorpions 102,248

Molluscs 85,000

Crustaceans 47,000

Corals 2,175

Others 68,827

Total Invertebrates 1,305,250

Answer 2

Species estimates:

How many species are there in the world?

This is a very good question, but the truth is, its very hard to know, or even estimate. Currently there are about 1.4 million species described. Yet, we're probably far from being close to the actual number of species.

Take this into consideration. In a famous study conducted in Panama, 19 trees were "fogged" with insecticide and the dead were collected as they fell through the canopy. In this study, nearly 1,200 species of beetles alone were collected. Of those, 80 percent were not known to science. While it may be dangerous to extrapolate numbers like these to other places, it gives at least a high estimate of the number of species that could exist on earth - that high estimate being around 100 million species. A low estimate is 2 million. The best estimate might be around 10 million. But even if that's the case, it means we've only known about a small fraction of what is presently there. Many of the species that we're discovering live in areas that are not often studied. Take the sea floor for instance. Hydrothermal vents along the floor provide a type of chemical energy for bacteria. These bacteria use this energy like plants use the energy of the sun. They then form the base of a giant food web thousands of feet below the surface. Only until recently have we been able to discover this new habitat. Now scientists believe there could be as many as a million species just in on the ocean floor.

Answer 3

There's countless billions animals on earth. Counting with insects and ants. There's probably billions of ants, alone. And a billion fishes, plus thousands of species who humans haven't even discovered yet.

Answer 4

There are probably hundreds of thousands of animals on the Earth.

Answer 5

Well more than half of the world is humans so, little than half would be the animals in wildlife and dogs and cats that live with you.

Answer 6

About 3 to 30 million species.

Answer 7

about 6 trillion?

Answer 8

uncountable