Most Populous Vertebrae Animal Species In The World

According to https://en.m.wikipedia.org/wiki/Lists_of_organisms_by_population

No data for: rats, mice, bats, and squirrels. Or Reptiles

Insects have over 50,000,000,000,000,000 individuals alone

Only vertebrae animals

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Last updated: July 18, 2020

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First submitted	April 28, 2020
Times taken	35
Average score	86.7%
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24 Billion	8 Billion	1.5 Billion	1 Billion


1 Billion	900 Million	850 Million	600 Million


475 Million	300 Million	260 Million	175 Million


60 Million	45 Million	Unknown (probably a lot)

Level 65

Apr 28, 2020

These are notably all vertebrates when in fact the most populous species of animals by far are those of nematodes and arthropods and probably some other lineages that are not Craniates

Level 29

Apr 29, 2020

Well I know there are many many nematodes but there is no number especially on wiki

Level 85

Apr 29, 2020

Can you accept rat or mouse? "Rodent" is an order which covers everything from a capybara to a shrew. Since you distinguish between cows and water buffalos or horses and donkeys in previous questions, it's hard to intuit that you're asking for the entire order name for the last question. Thanks.

Level 29

Apr 29, 2020

Rat and mouse work now