This sound effect can be found on the Hanna-Barbera Sound Effects Library, which was made by Sound Ideas. Links: https://sounddogs.com/Search?RecordingType=Sound%20Effects%20and%20Music&NavSearch=True&keywords=10294637 https://soundeffects.fandom.com/wiki/Sound_Ideas,_HYENA_-_HYENA_LAUGHING,_ANIMAL#Audio_Samples