The riparian galleries, normally associated with meadows, are dominated by common alder trees (Alnus glutinosa) in medium and low altitude areas and by birch trees (Betula alba) at higher altitudes. Well preserved on the valley, the galleries are continuous lands that include large-scale trees with, occasionally more than one row in each margin.
At the end of spring, the meadows exhibit a rich and exquisite colour palette as the result of the signi cant existing oristic diversity. A special highlight goes towards the wild orchid species that normally generate great interest (Dactylorhiza maculate, Orchis coriophora, Serapias lingua, Serapias cordigera).
These are the areas, together with their associated woodlands, registering the highest concentration of different groups of fauna species. In terms of birds, there is the white-throated dipper (Cinclus cinclus), in terms of mammals there are the otter (Lutra lutra), the fox (Vulpes vulpes) and the roe deer (Capreolus capreolus) and in terms of reptiles and amphibians, there are the Iberian painted frog (Discoglossus galganai) and the European pond turtle (Emys orbicularis).