A pair of rare orange primates – each barely bigger than a can of beer – has been introduced at Chester Zoo.

Originally from the forests of Brazil, golden lion tamarins are an endangered species following the expansion of construction, livestock farming and logging in their native habitat.

Chester Zoo primate keeper James Star said: “A co-ordinated breed-and-release programme was initiated across conservation zoos around the globe… helping to turn it around and bring them back from the brink.”

Literally pint-sized George and Leaf, who only stand eight inches (20cm) tall, are said by zoo staff to be “getting along brilliantly” with other animals.

Golden lion tamarins are named after the mane-like ruff around their heads.

They have long fingers and hands that help them forage for insects in tree crevices.

Their bright orange coats make them easy to spot when they are jumping from tree to tree.