What is the happiest animal in the world?

The Elephant Theory:

When it is sunny, we're more happy (the majority of times), yes?

When it is rainy and usually a bit dark and gloomy, we often get a little morbid about it, yes?

Yes.

Elephants live in hot climates, such as India and Africa, etc. therefore the sun is always shining. This will automatically sent signals of happiness to the brain, therefore creating a more happy emotion.

Not only this, but think about it, if you were an elephant you wouldn't have to put up with little animals annoying you cause you'd be able to just stomp on them and stop the annoyance. Also, elephants are proven to be extremely intelligent and can often find the graves of their ancestors, making them more historically advantaged.

Elephants are great, and by far the happiest animal in the world.