This sound effect can be found on Soundrangers Sound Effects Library, which was made by Pro Sound Effects. Links: https://download.prosoundeffects.com/track/893025 https://soundeffects.fandom.com/wiki/Pro_Sound_Effects,_Dinosaur,_T-Rex,_Monster,_Tyrannosaurus_Rex,_Raptor,_Creature,_Prehistoric_08#Audio_Samples