栗鼠が

squirrel(s) as the subject

→ 栗鼠
phrase Rare #34,469
squirrel(s) as the subject 栗鼠 means “squirrel,” and が marks it as the subject of the sentence. The word is more commonly written リス.
JA: 栗鼠が木の実を食べています。
EN: A squirrel is eating a nut.