Which mammal group lays eggs instead of giving birth to live young?

Monotremes.

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  1. Placentals
  2. Marsupials
  3. Monotremes ✔

Why: The five monotreme species, the platypus and echidnas, lay eggs.

Huh, didn't know that: The five monotreme species, the platypus and echidnas, lay eggs.

The dad joke
Those mammals really egg you on.
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References

Answer: Monotremes. The five monotreme species, the platypus and echidnas, lay eggs.

  1. Mammal en.wikipedia.org/wiki/Mammal
    except the five species of monotremes, which lay eggs
    Checked 2026-11-07.

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