How many animal species do we have?

How many animal species do we have?

There are in excess of 1.5 million creature species. Going from basic creatures like sponges and jellyfish, the invertebrates creatures incorporate the arthropodphylum with more than 1 million types of insects. The higher level vertebrates incorporate fish with around 35,000 species. Around 350 million years back, when aquatic creatures moved to land, they adjusted to the new nature and amphibians were born. They adapted some more and becoming reptiles. From reptiles came the birds and around 4000 known types of mammals or warm blooded animals.

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