The "Jeziorna" Ecological Woodland comprises a fragment of a small river valley - the Jeziorna River Valley. The river is from 0.5 m to 1 m wide and up to 0.4 m deep, and it flows in its natural riverbed. Along the Jeziorna Valley flora species growing on waterlogged grounds have their habitat. Land overgrown with carex species, willow and alder scrubs is good for the development of many amphibian species.
A little higher, the valley bottom is overgrown with scrubs and trees in which alder trees dominate, and oaks, hazel and hornbeam grow on the hills. Cranes nest in the "Jeziorna" Ecological Woodland.