Which is the largest order of mammals by number of species?

Rodents.

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  1. Bats
  2. Primates
  3. Rodents ✔

Why: Rodentia, the gnawing mammals, is the most species-rich order.

Huh, didn't know that: Rodentia, the gnawing mammals, is the most species-rich order.

The dad joke
Rodents really gnaw their way to the top.
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References

Answer: Rodents. Rodentia, the gnawing mammals, is the most species-rich order.

  1. Mammal en.wikipedia.org/wiki/Mammal
    The three largest orders in numbers of species are Rodentia
    Checked 2026-11-07.

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