The Dangerous Wild Animals Act of 1976 is thought to be the reason that there are so many Alien Big Cat sightings in the United Kingdom. In the late 1960s and early 1970s, keeping big cat species was popular and fashionable. This act “provides that no person may keep any dangerous wild animal except under the authority of a licence granted by a local authority”. Pet shops, zoos, and circuses are not confined under the law, but this is to keep wild animals out of the hands of the general public.
Upon this act being enabled, it is thought, many people that could not bear the thought of euthanizing their beloved pets and could not afford to send them to their proper demographics (or perhaps, were too lazy to find them a home at a zoo or sanctuary). Rather, they released their pets into the woodlands of the UK. Experts believe that the big cats that were released bred and were able to survive on prey in the forests, as well as farms sometimes. It is estimated that there are over 2,000 sightings of alien big cats every year but the vast majority of which never file reports with police.