If you are a bird lover, this is surely a sight not to be missed. There are several small islands off Hiiumaa that have a massive bird population, where you can see over 110 different species that flock here throughout the year. Some of these include avocets, eider ducks, and goosanders. Hiiumaa is also one of the stopping points for the swans whilst on their migratory path. If you are more into the plant life, you will discover over 600 different varieties of plants.