Check out this article I found online.

The simplest grammar, it says, can be taught to a common songbird. That's if you believe research some supposed expert has put forward.

The simplest grammar, long thought to be one of the skills that separate man from beast, can be taught to a common songbird, new research suggests.

Starlings learned to differentiate between a regular birdsong "sentence" and one containing a clause or another sentence of warbling, according to a study in Thursday's journal Nature. It took University of California at San Diego psychology researcher Tim Gentner a month and about 15,000 training attempts, with food as a reward, to get the birds to recognize the most basic of grammar in their own bird language.

So do these results disprove famed linguist Noam Chomsky's theorythat "recursive grammar" is uniquely human and key to the facility to acquire language?

Are these songbirds actually 'learning' grammar?