If you get two or more of them together at the same time, they start dancing. And it is SO ADORABLE OMG.
I saw it get up to five before one of the Moogles started glitching out.
The peach blossoms are in bloom, and the city-states of Eorzea are decorated for the event! But the cutest "decorations" are the birds everywhere, including one that has Moogle eyes and whiskers and a pom-pom. :3