Hyyriänmäki contains some very valuable peaty forest with lots of decayed wood where endangered birds in the tit family and traces of the three-toed woodpecker have been spotted. The lynx also enjoys this landscape with its differences in altitude. A particularly beautiful stream, which increases the biodiversity of the area, also twists its way through Hyyriänmäki and flows into lake Aitjärvi.

Haukkalehto, which lies alongside Hyyriänmäki, will become Merja Salo’s memorial grove. The purchase of Hyyriänmäki and Haukkalehto was funded partially with the remaining funds from Merja Salo’s fundraiser, and mostly with funds from the Finnish Natural Heritage Foundation’s fundraising campaign Turvapaikkoja metsälinnuille Etelä-Karjalaan (A Sanctuary for Forest Birds in South Karelia).