Humans have decoded the language of some birds:
How to decode the secret language of birds
For centuries, Native Americans have relied on so-called "bird language" to learn the whereabouts of people and other animals that would otherwise remain invisible to the human eye. "A lot of indigenous people have been using bird language to know where mega-predators are," says Pinar Ateş Sinopoulos-Lloyd, co-founder of Queer Nature, who leads courses on bird language. "They are able to decipher how birds communicate and warn each other in the forest."
Birds have their own languages. This was known recently however this was portrayed in the Quran 1400 years before it was discovered. The Quran says that birds have their own languages:
And Solomon succeeded David. He said, "O people, we were taught the language of birds, and we were given from everything. This is indeed a real blessing."
١٦ وَوَرِثَ سُلَيْمَانُ دَاوُودَ ۖ وَقَالَ يَا أَيُّهَا النَّاسُ عُلِّمْنَا مَنْطِقَ الطَّيْرِ وَأُوتِينَا مِنْ كُلِّ شَيْءٍ ۖ إِنَّ هَٰذَا لَهُوَ الْفَضْلُ الْمُبِينُ
Solomon learned the language of birds.
The Quran also says that all animals glorify Allah but we cannot comprehend their languages:
The seven heavens and the Earth and everyone in them glorify Him [Allah]; and there is nothing that doesn't glorify Him thankfully; but you (humans) do not understand their glorification. He is Compassionate, Merciful
٤٤ تُسَبِّحُ لَهُ السَّمَاوَاتُ السَّبْعُ وَالْأَرْضُ وَمَنْ فِيهِنَّ ۚ وَإِنْ مِنْ شَيْءٍ إِلَّا يُسَبِّحُ بِحَمْدِهِ وَلَٰكِنْ لَا تَفْقَهُونَ تَسْبِيحَهُمْ ۗ إِنَّهُ كَانَ حَلِيمًا غَفُورًا
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