Kolansko marsh mud is an ornithological reserve on the island of Pag. Located on the south coast between Novalja and Kolan. It is surrounded by cultivated fields, pastures and rocky. Reserve at the edges covered with reeds that every year more and more reduces the free water surface. The importance of wetlands in the Mediterranean variety of flora and fauna, especially in the fact that birds originating from the Croatian and other parts of Europe during the spring and autumn migration stop here to be fed, rested or sleep. Many species of birds wintering here.