Edernish is basically a granite rock in the ocean that - over the millions of years - was covered with soil on which grass, flowers, shrubs and trees developed. Nowadays the island is about 60% grass and shrubs 5% lakes and the balance is covered with trees.

The trees have been introduced by us during the last 16 years. After their establishment especially birds have settled on the island by a large number. Mammal inhabitants include an Otter family, Foxes and Badgers.