This sound effect can be found on The International Sound Effects Library, which was made by Sound Ideas. It includes the 1st half of UNIVERSAL, ROAR - T-REX SCREAM. Links: https://soundideas.sourceaudio.com/track/7560275 https://soundeffects.fandom.com/wiki/Sound_Ideas,_MONSTER_-_HUNTING,_GROWLING,_RUNNING#Audio_Samples