Listen first:
https://www.youtube.com/watch?t=30&v=wOzgCyoi9l8
This is an area of particular interest to me. One of the first realisations in my 'awakening,' was eth realisation that the Bible was plain wrong in the statement made at 2 Peter 2:12:
The KJV translates it as:
But these, as natural brute* beasts, ...
In the NWT (large study version), Freddy decided to say:
But these, like unreasoning animals ...
The NIV is similar:
They are like unreasoning animals
The RSV decided on:
these, like irrational animals, creatures of instinct,
Even 30 years ago, it was becoming evident, that the idea that animals could not reason (think) was wrong. And, if that idea, as expressed in the above verse, is wrong, then clearly the Bible is not inspired and the whole christian thingie is bullsh*t.
Since then, science has collected more and more evidence that the idea of 'unreasoning' animals is based on superstition, not evidence. I've posted on this from time to time.
Now, none of us will understand the gibbon 'talk' in the above video, but by a process of recording sounds, and watching reactions it became clear that different sounds meant different things, and the article in this link discusses the research that went into decoding gibbon-speak.
link: http://www.sci-news.com/biology/science-language-lar-gibbons-02683.html
--------------------
*The word that the KJV translates as 'brute,' is alogos with the essential English meaning of:
destitute of reason
See, https://www.blueletterbible.org/lang/Lexicon/Lexicon.cfm?strongs=G249&t=KJV
hence 'unreasoning'