Unique frog
and rare orchid
Hållnäs' nature reserve stretches from Rödhäll in the north to the shallow archipe-lago of Örnsten in the south. It contains several unique tighly clustered lakes, which are warm and rich in calcium but low in nutritiun. Among the flora and fauna belonging to this area is the remarable ranaleffonae, a species of frog found only here in all of Scandinavia. The loud croaking of this frog during the mating period makes for an eerie contribution to Hållnäs wildlife.

The protected frog rana leffonae is a remmant from the warmer climate of the Bronze Age.