How to Say "mammal" in Spanish
The Spanish word for “mammal” is “mamífero” — B1 level.

Examples
El perro es un mamífero muy leal.
The dog is a very loyal mammal.
Las ballenas son mamíferos, no peces.
Whales are mammals, not fish.
Existen miles de especies de mamíferos en todo el mundo.
There are thousands of species of mammals all over the world.
Always Masculine
Even if you are talking about a female animal (like a cow), the word 'mamífero' itself is a masculine noun. You say 'La vaca es UN mamífero'.
The Accent Mark
The stress is on the third-to-last syllable (í). Words like this always need a written accent mark in Spanish.
Forgetting the Accent
Mistake: “mamifero”
Correction: mamífero (the accent on the 'í' is required because of how the word is pronounced).
Gender Confusion
Mistake: “La ballena es una mamífera.”
Correction: La ballena es un mamífero. The category 'mammal' doesn't change gender to match the animal's sex.
Other Meanings of “mamífero”
“mamífero” can also mean:
- Describing a species that belongs to the mammal group.(B2, formal)
Related Translations
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