What are some four-letter mammals?

12 of the 124 mammals in Icillion have exactly 4 letters, for example Lion, Bear and Wolf.

Which four-letter mammals start with D?

D is the most common first letter here, with 2 names, such as Deer and Degu.

Nature · lists

12 four-letter mammals in alphabetical order, from “Bear” to “Wolf”. Each one counts as an answer in Icillion.

12 of the 124 mammals have exactly 4 letters (10%).
Most start with D (2), L (2) and M (2).
Only names of one word are counted, and only their letters: spaces, hyphens and apostrophes are not.

What are some four-letter mammals?: 12 of the 124 mammals in Icillion have exactly 4 letters, for example Lion, Bear and Wolf.
Which four-letter mammals start with D?: D is the most common first letter here, with 2 names, such as Deer and Degu.

How deep does your knowledge go?

Seven prompts a day, twenty seconds each. Obvious answers float on the tip of the iceberg; rare ones sink all the way to the trench.