An estimated 7000 feral rabbits are currently living in Helsinki. These former pets and offspring of former pets are spreading into other regional areas in efforts to find land enough to sustain them. The rabbits have been destroying park land and local vegetation in their quest for food.
Few natural predators and mild winters have added to the population growth. Arno Kasvi, head gardener at Turku University’s Botanical Gardens, has called for a culling of the rabbits before the population becomes unmanagable.
Additional article: http://www.yle.fi/uutiset/news/2009/02/urban_rabbit_population_explodes_554379.html