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The site was identified as important in 2010 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 List1	Season	Year(s)	Size	IBA criteria
Spotted Crake Porzana porzana	LC	breeding	2010	2-3 breeding pairs	C6
Baillon's Crake Zapornia pusilla	LC	breeding	2010	1-2 breeding pairs	B2, C2, C6
Eurasian Bittern Botaurus stellaris	LC	breeding	2010	2-3 males	C6
Common Little Bittern Ixobrychus minutus	LC	breeding	2010	100-150 breeding pairs	B2, C6
Pygmy Cormorant Microcarbo pygmaeus	LC	breeding	2010	10-22 breeding pairs	C6
Pygmy Cormorant Microcarbo pygmaeus	LC	winter	2010	250-800 individuals	B1i, C2, C6
Moustached Warbler Acrocephalus melanopogon	LC	winter	2010	500-600 individuals	C2, C6
A4iii Species group - waterbirds	n/a	winter	2010	min 20,000 individuals	A4iii, C4

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2010) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2013) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Natural system modifications	happening now	whole area/population (>90%)	slow but significant deterioration	high
Pollution	happening now	whole area/population (>90%)	slow but significant deterioration	high

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Whole area of site (>90%) covered by appropriate conservation designation	A management plan exists but it is out of date or not comprehensive	Very little or no conservation action taking place	low

Year	Protected Area	Designation	% overlap with IBA
1983	Vransko jezero - rezervat	Posebni rezervat	15
1999	Vransko jezero	Park prirode	97
2007	Vransko jezero i Jasen	Other Area	100
2013	Vransko Lake	Ramsar Site, Wetland of International Importance	97
2013	Vransko jezero i Jasen	Site of Community Importance (Habitats Directive)	91
2013	Vransko jezero i Jasen	Special Protection Area (Birds Directive)	91
2013	Ravni kotari	Site of Community Importance (Habitats Directive)	9
2013	Ravni kotari	Special Protection Area (Birds Directive)	9

Habitat1	Habitat detail	% of IBA
Artificial/Terrestrial	Arable land	-
Wetlands (inland)	Standing freshwater, Water fringe vegetation	-

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	-
fisheries/aquaculture	-
hunting	-
tourism/recreation	-
other	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Vrana Lake and Jasen (Croatia). Downloaded from https://datazone.birdlife.org/site/factsheet/vrana-lake-and-jasen-iba-croatia on 23/11/2024.