Avaste nature reserve consists of forests, fens, bogs and meadows.

The flora of the nature reserve includes sweet gale, mud sedge and several species of orchid.

Several species of rare or threatened birds furthermore have a habitat in the nature reserve.

These include black stork, white-backed woodpecker, Eurasian goshawk, short-eared owl, three species of eagle and others.

[1] A 2.6 km (1.6 mi) long hiking trail runs adjacent to the nature reserve.