The highly intelligent parrot has a specific call, that—like human laughter—puts other parrots that hear it in a good mood. This makes the kea the first known non-mammal to show contagious emotion, joining the ranks of humans, rats, and chimpanzees.
Scientists already knew that kea—native to New Zealand's mountainous South Island—make a non-threatening warbling sound while playing with other kea. But since the birds also warble alone, the noise could simply be an expression of pleasure. Go here to see a video
NO LAUGHING MATTER
Kea play a lot—by themselves, with others, on the ground, or in the air.
While aloft, kea perform aerial acrobatics and chase each other. Playing with objects is usually solitary, with a bird manipulating an object with its beak and/or feet, but it can also involve birds tossing an object between each other. (Also see "Walruses Found Using Birds as Toys for First Time.")
The very fears and guilts imposed by religious training are responsible for some of history's most brutal wars, crusades, pogroms, and persecutions, including five centuries of almost unimaginable terrorism under Europe's Inquisition and the unthinkably sadistic legal murder of nearly nine million women. History doesn't say much very good about God.