According to reports from Russia, the 7-year-old 'bird boy' has spent his life in a flat filled with bird cages with a mum who treated him like one of her pets.

Pravda said the boy's 31-year-old mum did not talk him and treated him like a bird, forcing him to learn avian language.

Social worker Galina Volskaya said shocked authorities discovered the boy in a two-bedroom apartment with bird mess littering the floor.

Volskaya said: “When you start talking to him, he chirps."

And she added that the boy becomes frustrated at not being able to communicate and flaps his arms.

Pravda reported that authorities believe the boy is suffering from Mowgli syndrome, after the Jungle Book character who is raised by wild animals.

The boy has reportedly been released by authorities and put in a medical facility.