aardvark
Refers to the animal Orycteropus afer. The katakana spelling ツチブタ is standard.
I saw an aardvark at the zoo.
Katakana spelling is standard for this animal name; usually written in kana.
Kanji spelling is rare and may not be recognized by all readers; the katakana form is strongly preferred.
A Japanese calque of Afrikaans aardvark, literally “earth pig,” formed from 土 “earth” and 豚 “pig.”