An orphaned baby wallaby is being hand reared in a rucksack after his mother died of pneumonia.

The tiny four-month-old joey, named Riley, has to be fed every four hours and carried everywhere in a substitute pouch by a keeper at Studley Grange Butterfly World and Farm Park near Swindon.

Julia Stewart, who has been looking after Riley, said it was "like having a baby or being pregnant all over again".