In the middle of the last century, the waters of the Sil were stopped, but that did not stop its life, which was transformed. A large shallow wetland with an excellent riparian forest hosts a large number of interesting waterbirds.

Oasis in the Sil

It is a reservoir measuring one kilometre and a half long by 600 meters wide on the Sil river valley and was built in the early 1950s. Two villages flank the reservoir, A Rua and Petín, and there is still room for nature, especially at the end of the reservoir where the shallowness and deposits have given way to a large riparian forest that provides shelter to a most interesting fauna.

It is easily accessible on foot, which enables a simple visit full of birds.

The routes

Route on foot or by bicycle: A Rua - End of the reservoir


From September to June, especially January, February and May


1,8 Km


1 hour on foot and a half-hour by bicycle


No difficulty


A Rúa, Petín


A Rua - End of the reservoir

Key points on the route:

  1. On the water's surface (1) great crested grebes are frequent, as are ducks of various species, especially in winter.
  2. South of the dam (2) there is a great river forest where nests of grey herons can be seen in spring.
  3. In spring and early summer black kites and common storks are common.
  4. On the banks there are species such as cetti's warbler, common nightingale, eurasian blackcap and iberian green woodpecker.


The birds

Throughout the year there is a series of characteristic waterbirds such as the great crested grebe and grey heron. In winter, they are joined by several species of Anatidae and great cormorants. In spring black kites and white storks are frequent. The groves on the banks are frequented throughout the year by small birds.

Tips and resources
  • The wetland birds are sensitive. Respect their well-being by watching from afar - use of a telescope nearly essential.

  • Due to its accessibility and convenience, this is an ideal enclave to begin watching waterbirds