antelope
Refers to antelope species; typically written in katakana.
There are many antelopes on the African savanna.
pronghorn; pronghorn antelope
gerenuk; Waller's gazelle
Usually written in katakana; usually written in kana.
Kanji form is rare and mainly encountered in older or formal texts.
The reading れいよう is a Sino-Japanese on'yomi reading of the kanji 羚羊, which is a Chinese-derived term for antelope. The katakana form レイヨウ is the standard modern spelling.