Some of the greatest birds colonies in the world are located in this area. Letea is the oldest natural reservation in Romania, established in 1938.
Rosca-Buhaiova is a very diverse area of the Danube Delta: lakes and sand banks, flooded areas and a rich fauna. The fauna includes foxes, otters or even wild boar and the largest colony of white pelicans in Europe (about 7.000). It is a protected area starting with the 1940's when it was declared a Natural Reservation. Forty years late it was declared a Biosphere Reservation, together with Letea forest.
Letea is a forest located between Chilia and Sulina branches of the Danube. It was declared a Biosphere reservation because it hosts several rare species of plants, some of them unique in the world. It's interesting that most of the exotic plants from Letea appeared as a result of migratory birds bringing with them seeds from Africa. The trees are twisted in a strange way and bend to the water.