This is a moment a koala bear mum gives her joey a lesson in how to get to the top.

The pair – videod at their enclosure in Schoenbrunn Zoo, Vienna, Austria – are seen clambering through the branches of a eucalyptus tree.

And when the young joey – called Aruma – wants to reach some of the sweetest leaves, he uses his mum as a ladder.

The footage shows the joey unceremoniously clambering over his mum’s head so he can stretch up to reach the hard to get branches.

Queenland Koalas are listed as endangered on the IUCN’s Red List of Threatened Species.

Zoo director Stephan Hering-Hagenbeck said in a statement obtained by Newsflash: “Conservation breeding is a central task of modern, scientifically managed zoos and aquariums in order to secure the existence of endangered animal species through reserve populations.”

Aside from the koala cub the zoo also celebrated its new giraffe calf and a young orangutan.

Head of the zoological department Eveline Dungl explained that the youngest member of the giraffe herd turned one year old this month.

She said: “The first birth of the female giraffe in 10 years, went quickly and without complications.

“Unfortunately, the acceptance of the young animal by the mother was a bit bumpy.

“It was an important experience for the social structure of the entire herd to witness the birth and growth of a young animal.”

Hering-Hagenbeck explained that the zoo also welcomed its first orangutan offspring in more than 20 years in 2020.

He said: “In 2020, two new females joined the orangutan group. The combination of support and years of experience is very important.”