The park is the only place in Britain where Snowdon lily and the Snowdon beetle can be found. It is the only place in the world where the Snowdonia hawkweed is found. An invasive species is growing in the park, too, called the "Rhododendron ponticum". It kills native species that live in the park and also makes fungus grow that is poisonous. The fungus stays alive up to seven years after the rhododendron is killed.