Words are made up out of letters. We all know that.
Letters represent mostly meaningless sound. (Note that even in syllabic languages such as Japanese, the words are still made up out of sounds).
We thought no other animal could put sounds together in different combinations to make words.
Nope. And, surprise surprise, it's a bird. The chestnut-crowned babbler is a highly social Australian bird that has been discovered to put one sound with another sound to create something that, well, means something.
The birds are definitely coming for us.