The barnacle goose has a black chest, white face and a grey back with bars across it.
Barnacle Geese often build their nests high on mountain cliffs.
Keep an eye open and you may spot a barnacle goose or a Bewick's swan.
It is an important winter roosting site for Barnacle Geese.
Barnacles were thought to be the embryos of a Barnacle Goose.
South Walls is a popular stopping off place for Barnacle Geese.
Smash a barnacle with a stone and you will see inside the shape from which the beautiful barnacle goose takes its name.
Switha has many storm-petrel burrows and is the winter home to a large colony of barnacle geese.
There's one super bit at the end where he tells you very seriously how barnacle geese are hatched out of barnacles.
In the Middle Ages people believed barnacle geese hatched from goose barnacles.