The Otter in the Riaño Mountains
The otter in the Riaño Mountains is an emblematic inhabitant of this spectacular natural environment located in the province of León. This mammal, known for its agility and adaptation to aquatic ecosystems, has found an ideal habitat for its development in this area. Throughout this article, we will explore the presence of the otter in Castile and León, its natural habitat, and why the Riaño Mountains are a perfect territory for its conservation.
Are There Otters in Castile and León?
Yes, otters are widely present throughout Castile and León, and their distribution is fairly homogeneous. According to a study conducted by Javier Morales and Mª Asunción Gómez-Gayubo, otters are present in 69.5% of the sampled stations and in 76.7% of the UTM 10 km grid squares across the region. The province of León, where the Riaño Mountains are located, is one of the areas with the highest density of this species, with otters occupying 88.2% of the territory.
The report also indicates that otters have recolonized areas where they had previously disappeared, thanks to improvements in water quality and the protection of aquatic ecosystems.
What Is the Otter’s Natural Habitat?
Otters prefer aquatic ecosystems with clean water, abundant riverside vegetation, and a good supply of food such as fish and crayfish. Their natural habitat includes:
Slow-flowing rivers with well-preserved riverbanks.
Lakes and reservoirs with dense vegetation.
Wetlands and marshy areas with natural shelters.
In Castile and León, otters can be found in river basins such as the Duero, Miño, and Ebro, being especially abundant in the northern tributaries.
The Riaño Mountains: An Ideal Territory for Otter Life
The Riaño Mountains offer a privileged environment for otters thanks to:
Network of rivers and reservoirs: such as the Riaño Reservoir, which provides food and shelter throughout the year.
Protected ecosystem: the area is part of the Natura 2000 Network, ensuring habitat conservation.
Water quality: limited industrial activity and low pollution levels create a clean and healthy environment for otters.
Thanks to these factors, our region has become a key location for otter watching in Castile and León, attracting nature lovers and wildlife photographers alike.
In short, the otter in the Riaño Mountains has found an ideal habitat for its survival and expansion. If you are passionate about wildlife, this area offers a unique opportunity to observe this fascinating mammal in its natural environment. Don’t hesitate to visit the Riaño Mountains and discover their rich biodiversity!
Where to See Otters in the Riaño Mountains?
“Casar del Puente” Hide (Boca de Huérgano)

