The significance of nature friendly banks for the aquatic invertebrate fauna The last 25 years the Ministry of Transport constructed more than 450 km of nature friendly banks along their waters to compensate the destruction of nature by defending the banks with stone and steel. In this study the differences in the composition of the aquatic invertebrate fauna between the traditional banks and the nature friendly banks was investigated. In nature friendly banks the number of species, diversity and the number of rare species increases and the distribution of the feeding guilds is more natural.