"Kemonotachi no Yoru/RONDO" (獣たちの夜/RONDO) is the 38th single by the Japanese rock band Buck-Tick, released on May 22, 2019 on the label Lingua Sounda (Victor). The song "Rondo" is used as the ending theme for the GeGeGe no Kitarō anime since episode 50. Cube Juice, the project of the music producer Nagao Shinichi, participates in track 3 with Kemonotachi no Yoru's remix. The track Kemonotachi no Yoru, in a different version, is part of the album Abracadabra.

The single peaked at the 4th position on the Oricon charts.

All lyrics are written by Atsushi Sakurai; all music is composed by Hisashi Imai.