From its sources below Praponek and in the area of Veliki Vrej and the state border with Hungary, the Mala Krka (Little Krka) with its tributaries is preserved in a mostly natural state, with preserved hydrological and hydromorphological characteristics. Along its lively course, widely varied flora has grown on its banks. The Mala Krka is part of the extensive habitat of the otter Lutra lutra.