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How many different species of animals are there?

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Of all invertebrates, the insects are by far the most numerous; there are so many insect species, at least 10 million, that scientists have yet to discover them all, let alone name or count them. Vertebrate animals, including fish, amphibians, reptiles, birds and mammals, represent the a puny 3% of all living species. read more

Confident in their method, the scientists then used it on all major groups of species, coming up with estimates of 7.7 million species of animals, for example, and 298,000 species of plants. Although the land makes up 29 percent of the Earth’s surface, the scientists concluded that it is home to 86 percent of the world’s species. read more

There are also many different species of birds and frogs living in the rainforest. Species of mammals are less common, but there are still more than 200 species of monkeys and about a dozen species of sloths living in the rainforest. Deforestation causes animal species in the Amazon to die off at alarming rates. read more

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