This smart crow drops stones into a bottle in order to raise the water level so it could drink from it.

In the video filmed in the Fusheng Liuji Ecological Park, southern China, a crow is seen dropping stones into a half-full water bottle one by one, so that the water level would rise.

A staff member of the ecological park said that the crow drinking water is a new show launched by this year. He added: "Crows are very spiritual themselves and they were found to be doing this on their own and then were given some guidance as well."

In addition, the staff member said that the main purpose of showing this to visitors is to hope that children could learn about crows in reality.

The video was filmed on February 25 and provided by Fusheng Liuji Ecological Park with permission.