[mch82]

For those wondering which animals…

> They found such vocal play behavior documented in at least 65 species. That list includes a variety of primates, domestic cows and dogs, foxes, seals, and mongooses, as well as three bird species, including parakeets and Australian magpies.

Quote from the UCLA Newroom article referenced in the OpenCulture article, https://newsroom.ucla.edu/releases/animals-laugh-too-ucla-an...

[KineticLensman]

The full list is in the original research article [0], in both tabular and cladogram form.

[0] https://gabryant.scholar.ss.ucla.edu/wp-content/uploads/site...

[neuronic]

Since this is so broadly spread among species I wonder if there are other forms of laughing that aren’t easily detected if you don’t know about it. Does some form of muscle spasms occur in all of these animals?

Closely watching my cat now.

[rcarmo]

You should watch it closely anytime, it is very likely to be plotting something even if you can't tell it's laughing manically...

[KineticLensman]

> Since this is so broadly spread among species I wonder if there are other forms of laughing that aren’t easily detected if you don’t know about it

Yes. As per the original research article, some of the vocalisations are outside the range of human hearing.

[JumpCrisscross]

So in summary: primates, social mammals, domesticated mammals and vocal bird species?

[marcosdumay]

That short list is just social mammals and social birds. But I can't say if this is not selection bias from the researchers.