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The site was identified as internationally important for bird conservation in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Spotted Crake Porzana porzana	LC	breeding (1999)	25 males	C6
Little Crake Zapornia parva	LC	breeding (1999)	8 males	C6
Eurasian Bittern Botaurus stellaris	LC	breeding (1999)	12 males	B2, C6
Little Gull Hydrocoloeus minutus	LC	breeding (1996)	10 pairs	B2
Black Tern Chlidonias niger	LC	breeding (1999)	80 pairs	B2, C6
Montagu's Harrier Circus pygargus	LC	breeding (1999)	4 pairs	C6
Bluethroat Luscinia svecica	LC	breeding (1999)	6 pairs	C6

Year	Protected Area	Designation (management category)	% coverage of IBA
1992	Varniu regioninis parkas	Valstybinis parkas (V)	100
1992	Varniai	Regional Park (-)	100

Habitat	% of IBA	Habitat detail
Forest	50	Broadleaved deciduous woodland; Native coniferous woodland; Mixed woodland; Treeline ecotone
Wetlands (inland)	19	Standing freshwater; Rivers and streams; Raised bogs; Water fringe vegetation; Fens, transition mires and springs
Grassland	17	Humid grasslands
Artificial/Terrestrial	15	Arable land

Land use	% of IBA
nature conservation and research	100
rangeland/pastureland	17
agriculture	15
tourism/recreation	-
forestry	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Birzulius-Stervas marshes complex (Lithuania). Downloaded from https://datazone.birdlife.org/site/factsheet/birzulius-stervas-marshes-complex-iba-lithuania on 23/12/2024.