This sound effect can be found on Sony Pictures Sound Effects Library Volumes 1-5, which was made by Sound Ideas. Just like 01, a high pitched version of Sound Ideas, ELEPHANT - ANGRY ROARS, ANIMAL is included. A slightly higher pitched version is included as part of SoundDogs, Animals-Monkeys, Gorillas - Gorilla Silverback Congo Silverback Dat 01 02 on the left channel. Links: https://www.hooksounds.com/sound-effects/gorilla-roars-and-breaths-02/1620507/ https://soundeffects.fandom.com/wiki/Sound_Ideas,_Gorilla_Roars_and_Breaths_02_-_Series_of_gorilla_snarls,_breaths_and_roars#Audio_Samples