What are some four-letter pets?

12 of the 177 pets in Icillion have exactly 4 letters, for example Fish, Bird and Frog.

Which four-letter pets start with D?

D is the most common first letter here, with 3 names, such as Degu, Dove and Duck.

Nature · lists

12 four-letter pets in alphabetical order, from “Bird” to “Toad”. Each one counts as an answer in Icillion.

12 of the 177 pets have exactly 4 letters (7%).
Most start with D (3), F (2) and T (2).
Only names of one word are counted, and only their letters: spaces, hyphens and apostrophes are not.

What are some four-letter pets?: 12 of the 177 pets in Icillion have exactly 4 letters, for example Fish, Bird and Frog.
Which four-letter pets start with D?: D is the most common first letter here, with 3 names, such as Degu, Dove and Duck.

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.