They are notoriously shy around humans, beating their tails and chattering their teeth to try to warn us off before emitting loud whistles to tell other members of their colony to flee.

But when these alpine marmots see Matteo Walch, they scuttle to his side and show him nothing but affection.

The eight-year-old built up a remarkable relationship with the creatures since first being taken to see them by his nature-loving family four years ago.