Red squirrels have been replaced over a large part of Great Britain by the non-native grey squirrel, introduced from North America in the late 19th century. Today, the British population of red ...

Stan Boutin has climbed more than 5,000 spruce trees in the last 30 years. He has often returned to the forest floor knowing if a ball of twigs and moss within the tree contained newborn red squirrel ...

Grey squirrels are an invasive, non-native species introduced from North America to sites in Great Britain and Ireland between 1876 to 1929. They out-compete the native red squirrels and multiply ...