Bristol Zoo Gardens has recently been the recipient of a mysterious piece of art work.

Officials at the zoo recently found a framed sign just outside the zoo's cafe which labels the inhabitants: Homo sapiens. The sign offers details on the species Homo sapien and bears a resemblance to those which appear outside of zoo exhibits.

Speculations suggest that the work has been left by the popular street artist Banksy.

Bristol Zoo Gardens has decided to leave the sign up.