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The site was identified as internationally important for bird conservation 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 List	Season (year/s of estimate)	Size	IBA criteria
Ferruginous Duck Aythya nyroca	NT	breeding (2010)	150–300 pairs	A1, B1i, B2, C1, C2, C6
Ferruginous Duck Aythya nyroca	NT	passage (2010)	2,600–6,700 birds	A1, A4i, B1i, C1, C2
Corncrake Crex crex	LC	breeding (2010)	20–80 males	A1, C1
Little Crake Zapornia parva	LC	breeding (2010)	10–30 pairs	C6
Black Stork Ciconia nigra	LC	breeding (2010)	10–13 pairs	B2, C6
White Stork Ciconia ciconia	LC	breeding (2010)	55–75 pairs	C6
Common Little Bittern Ixobrychus minutus	LC	breeding (2010)	70–140 pairs	B2, C6
Lesser Spotted Eagle Clanga pomarina	LC	breeding (2010)	4–6 pairs	C6
White-tailed Sea-eagle Haliaeetus albicilla	LC	breeding (2010)	9–11 pairs	B2, C2, C6
Black Kite Milvus migrans	LC	breeding (2010)	6–8 pairs	C6
Middle Spotted Woodpecker Leiopicus medius	LC	resident (2010)	500–800 pairs	B3, C2, C6
Collared Flycatcher Ficedula albicollis	LC	breeding (2010)	3,000–6,000 pairs	B3, C2, C6
A4iii Species group - waterbirds	n/a	winter (2010)	min 20,000 birds	A4iii, C4

Year	Protected Area	Designation (management category)	% coverage of IBA
2007	Pokupski bazen	Other Area (-)	100

Habitat	% of IBA	Habitat detail
Forest	-	Alluvial and very wet forest
Wetlands (inland)	-	Standing freshwater; Water fringe vegetation

Land use	% of IBA
agriculture	-
fisheries/aquaculture	-
forestry	-
hunting	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Pokuplje Basin (Croatia). Downloaded from https://datazone.birdlife.org/site/factsheet/pokuplje-basin-iba-croatia on 22/12/2024.