In 1965 just over 90% of Tunøs 348 hectares was protected with the exception of cottage areas, Kirkeskoven and Tunø City. The island was protected, because this is a very beautiful and distinctive nature, and we wanted to preserve agriculture and forestry, and to provide access to the public by laying paths and areas to stay.
Tunøs many hours of sunshine and low rainfall creates a special climate that allows the fig and mulberry trees to grow here. The island has previously been covered by oak forest, where” Valdemar den Store” held the royal hunts. But when Aarhus Cathedral was to be built, the oak wood was converted into lumber for construction and inventory, which can be seen in the cathedral today.
At Tunø you can experience a diversity of field flowers that waves in the wind, and the forest appears almost like a jungle with many different types of wood in a wilderness including wild honeysuckle.
Tunøs varying nature with grasslands and meadows, forest and bog provides insects’ good habitats.
At Tunø there are many deer, hares, pheasants and many birds, but otherwise there are very few wild mammals. For example is there neither foxes, squirrels or moles.
The green toad has its northern habitat on Tunø. In 2006, the village pond was purified, and several new lakes and water areas were established on the island, so the green toad got better nesting sites.
Large colonies of sand martins and gulls are breeding in the cliffs. We will also find the 5th largest colony of the rare auk black guillemot that only breeds in about 18 sites in Denmark. During the winter it is possible to see eiders, velvet scoter, goldeneye, and a small population of breeding merganser.
In the ocean around Tunø you may be lucky to see harbor seals and porpoises, which sometimes follows both the ferry, sailing boats and those who walk around the island.