As a result of its location, climatic diversity and habitats, serra da Estrela presents a high and relevant biodiversity, where birds stand out as the most representative group among vertebrates. 

During all year, it is possible to observe in the mountain a high number of species, some of them specialized in mountain habitats, and wich in Portugal, due to it's specific ecological needs, have their distribution restricted to this areas.

In addition to the 73 resident species, known to the date in serra da Estrela, we can observ a significant number of sazonal species, wich 44 are summer visitors and 27 winter visitors.

Due to it's location, serra da Estrela constitutes a geographical barrier, and during migrations, it is possible to count a significant number of species that remain here for a short period of time.