Complete list of animals found to have play vocalisations (laughter) can be found in the linked study (pdf): https://gabryant.scholar.ss.ucla.edu/wp-content/upl

Complete list of animals found to have play vocalisations (laughter) can be found in the linked study (pdf): https://gabryant.scholar.ss.ucla.edu/wp-content/uploads/sites/20/2021/05/Play_vocals_Bioacoustics_2021.pdf https://gabryant.scholar.ss.ucla.edu/wp-content/uploads/site... Includes species of cats, dogs, monkeys, rodents, birds, others.