The sandbanks at the river mouth are known as 'seal beaches' due to the consistent presence of gray seals, which are the largest marine mammals in the Baltic Sea.
Mewia Łacha was established in 1991 to protect the unique estuarine ecosystem and nesting sites for rare bird species.
The reserve is situated on the border between two administrative regions, connecting the Sobieszewo Island with the Świbno coast.
The shifting nature of the river mouth means that the topography of the sandbars changes significantly after heavy storms.
It is a key stopover for thousands of waterbirds migrating along the East Atlantic Flyway.
The name 'Mewia Łacha' translates to 'Gull Sandbank,' reflecting its historical significance for local gull populations.
Mewia Łacha is a protected nature reserve located at the eastern mouth of the Vistula River on Sobieszewo Island. It serves as a vital sanctuary for migratory birds and is one of the few places in Poland where gray seals can be regularly observed hauling out on sandbanks. The reserve covers approximately 150 hectares of diverse habitats, including seaside dunes, riverine forests, and shifting sandbars. It is recognized as a Ramsar site, identifying it as a wetland of international importance. The landscape is constantly reshaped by the dynamic interaction between the Baltic Sea and the Vistula River current. Visitors can access the area via designated trails that wind through coastal pine woods and dunes. It provides critical breeding grounds for species like the Little Tern and the Ringed Plover. The reserve's location at the river estuary creates a unique brackish environment supporting specialized flora. The site is part of the Natura 2000 network, ensuring strict environmental oversight and habitat preservation.
The observation deck overlooking the estuary allows for clear views of the river mouth and sandbars without disturbing wildlife.
Bring binoculars for wildlife viewing, as the seals and birds are best observed from a respectful distance to avoid disturbing them.
Wear comfortable, closed-toe walking shoes suitable for sandy trails and uneven terrain.
Stick strictly to marked trails to prevent habitat destruction, as the dunes and nesting areas are highly fragile.
Do not attempt to walk onto the sandbars where seals are resting, as this causes them to flee into the water and wastes their energy.
Maintain silence, keep dogs on a leash at all times, and do not approach seals resting on the sandbars.
