Sites - Important Bird and Biodiversity Areas (IBAs)
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Serras do Alvão e Marão
7o 49.00' West 41o 21.00' North
50 - 1,416m
Year of IBA assessment
Sociedade Portuguesa para o Estudo das Aves
Site description Mountains with NE-SW orientation and maximum altitudes of 1330 meters (Alvão) and 1416 m. (Marão). The site is longitudinally bounded by the valleys of the rivers Tâmega (at West) and Corgo (at East). The site reaches its lower altitude at river Corgo's mouth. This site holds a large diversity of geomorphologic situations and natural habitats, namely atlantic humid meridional heaths and mountanious grass-lands. Groves, oak forests of Quercus robur and Q. pyrenaica, water fringe forests of Salix alba and Populus alba and cork oak forests are also found.
Key Biodiversity Alvão and Marão mountains re important due to the presence of an isolated breeding pair of Aquila chrysaetos. The site also holds a resident colony of Pyrrhocorax pyrrhocorax that during winter increases its number with feeding individuals. These mountains have ornithological importance for holding interesting raptors and transaharian migratory passerines. There are 146 bird species refered for this area.