noun
Sumatran rhinoceros
Refers specifically to Dicerorhinus sumatrensis, the smallest living rhinoceros species, native to Southeast Asia.
スマトラサイは絶滅危惧種に指定されている。
The Sumatran rhinoceros is designated as an endangered species.
Kanji spelling exists but is rarely used; learners may encounter it in older or formal texts.
From スマトラ (Sumatra) + サイ (rhinoceros). The katakana spelling reflects its status as a modern biological term.