Airlines have had it with fake emotional support animals - here are some of the strangest animals people have tried to bring on planes

A woman tried (unsuccessfully) to bring a peacock onto a United flight recently, reportedly claiming that it was an emotional support animal, which would allow the animal to fly for free. 

But if you thought this was the strangest animal someone has tried to bring on board an airplane, you might be wrong.

United would not let the peacock onto its flight, saying that the animal did not meet the airline's guidelines.

And, it turns out, fake emotional support animals have been such a problem for airlines that Delta has had to be quite specific about what animals are not allowed on a flight.

Still, that's not to say people haven't tried.

Here are some of the strangest animals people have attempted (successfully or not) to bring on planes: