An exploited peatbog and abandoned system of ponds with scrub, mixed woodland, meadows and reedbeds, and surrounded by agricultural areas. The majority of the area is not utilized by man.
The most important breeding site for Circus pygargus in Lithuania. Breeding species of global conservation concern that do not meet IBA criteria: Crex crex (a few calling males).
BirdLife International (2019) Important Bird Areas factsheet: Tyruliai State Nature Reserve. Downloaded from http://www.birdlife.org on 06/12/2019.