Jeleniak Mikuliny nature reserve a forest nature reserve in the Koszęcin forest district, near the village of Pilka.
In the "Jeleniak-Mikuliny" nature reserve there are forest, water, rush and meadow communities. In the reserve itself and in its surroundings, covered by the buffer zone, 177 species of vascular plants were counted. Some of them are very rare and protected species.
The reserve protects the breeding site of the common crane, which has been nesting here since at least 1840. Until 1978 one pair of cranes nested here, but at the beginning of the 1980s a gradual increase in the number of this species was observed