Something strange was recently seen lurking outside a Texas zoo, and while the city has several theories, its identification is still a mystery.

Security cameras at the Amarillo Zoo captured the mysterious creature “in the dark and early morning hours” of Saturday, May 21, according to a June 8 news release from the city.

A still photo from the recording shows the life form outside the zoo’s perimeter fence at 1:25 a.m. that Saturday.

“Was it a person with a strange hat who likes to walk at night?” the city asked. “A large coyote on its hind legs? A Chupacabra? It is a mystery – for Amarillo to help solve.”

As the visitor’s identity remains unknown, the Texas Panhandle city has declared it an “Unidentified Amarillo Object” — or UAO, for short.

But city officials hope someone may be able to offer a better explanation.

Read more: yahoo