There have been a disturbing number of animals and birds being filmed laughing at humans. Humans have declined to comment but we have exclusive interviews from many merry mammals.

Some of the comments are reproduced below:

• Anonymous Otter: "hoh ha he-he hoh hoh".

• Carol, a Nightingale: "Fah Frew, Free Free Free".

• Dolphin Dennis_74: "he he he he he he ho ha ha ha ho he he he".

No Hyenas could be contacted at time of going to press.