A Fraga is a Galician special area of thick underbrush. The  Fraga de Sisalde  and Boedo river are both a nature area where are very important swampy pieces of land by the river and Sisalde forest as well as its etnographic wealth.

There are many examples of  forest species and there are also many different reptiles, amphibians and birds such as that one called  Escribano palustre. One of the most important mammal is called  lontra, the queen of the river. Wherever this mammal lives rivers are in good health.