This sound effect can be found on the Monsters and Creatures Sound Effects Library, which was made by Sound Ideas. It includes Sound Ideas, ANIMAL, GROWL - GUTTURAL, DEEP RUMBLING INHALE AND EXHALE 01 and Sound Ideas, ANIMAL, BREATHE - LARGE CAT-LIKE COMPLEX BREATH SOUND. Links: https://soundideas.sourceaudio.com/track/7552280 https://soundeffects.fandom.com/wiki/Sound_Ideas,_APE,_GIANT_-_LARGE_THREATENING_GROWL_02#Audio_Samples