This sound effect can be found on The General Series 6000 Sound Effects Library, which was made by Sound Ideas.
Links:
https://www.audiomicro.com/low-calls-camel-royalty-free-stock-music-887226
https://soundideas.sourceaudio.com/#!details?id=7620258
https://soundeffects.fandom.com/wiki/Sound_Ideas,_CAMEL_-_LOW_CALLS,_ANIMAL#Audio_Samples
The Straw Hats finally reach the desert kingdom of Arabasta and begin their race across the land to reach Alubarna before a massive war can break out between the kingdom's royal guards and the rebels. However, the true perpetrator of the war, Mr. 0 (Crocodile), and his remaining Baroque Works officer agents stand in the way of the Straw Hats reaching their goal.
