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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)	70–200 pairs	A1, B1i, B2, C1, C2
Corncrake Crex crex	LC	breeding (2010)	200–600 males	A1, C1, C2, C6
Spotted Crake Porzana porzana	LC	breeding (2010)	10–30 pairs	C6
Little Crake Zapornia parva	LC	breeding (2010)	10–50 pairs	C6
Black Stork Ciconia nigra	LC	breeding (2010)	60–80 pairs	B1i, B2, C2, C6
White Stork Ciconia ciconia	LC	breeding (2010)	400–500 pairs	C2, C6
Eurasian Spoonbill Platalea leucorodia	LC	breeding (2010)	70–140 pairs	A4i, B1i, B2, C2, C6
Common Little Bittern Ixobrychus minutus	LC	breeding (2010)	80–200 pairs	B2, C6
Black-crowned Night Heron Nycticorax nycticorax	LC	breeding (2010)	80–300 pairs	C2, C6
Purple Heron Ardea purpurea	LC	breeding (2010)	7–20 pairs	C6
Great White Egret Ardea alba	LC	winter (2010)	200–250 birds	C2, C6
Little Egret Egretta garzetta	LC	breeding (2010)	120–260 pairs	B1i, C2, C6
Whiskered Tern Chlidonias hybrida	LC	breeding (2010)	500–800 pairs	A4i, B1i, B2, C2, C6
European Honey-buzzard Pernis apivorus	LC	breeding (2010)	25–35 pairs	B3, C6
Lesser Spotted Eagle Clanga pomarina	LC	breeding (2010)	40–50 pairs	C2, C6
Greater Spotted Eagle Clanga clanga	VU	winter (2010)	2–3 birds	B1iii, C2, C6
Western Marsh-harrier Circus aeruginosus	LC	breeding (2010)	8–12 pairs	C6
Montagu's Harrier Circus pygargus	LC	breeding (2010)	2–3 pairs	C6
Hen Harrier Circus cyaneus	LC	winter (2010)	50–70 birds	C2, C6
White-tailed Sea-eagle Haliaeetus albicilla	LC	breeding (2010)	28–30 pairs	B2, C2, C6
Black Kite Milvus migrans	LC	breeding (2010)	30–40 pairs	C6
Common Kingfisher Alcedo atthis	LC	breeding (2010)	60–80 pairs	B2, C6
Grey-faced Woodpecker Picus canus	LC	resident (2010)	300–350 pairs	B2, C6
Middle Spotted Woodpecker Leiopicus medius	LC	resident (2010)	1,800–2,200 pairs	B3, C2, C6
Red-backed Shrike Lanius collurio	LC	breeding (2010)	15,000–18,000 pairs	B2, C2, C6
Barred Warbler Curruca nisoria	LC	breeding (2010)	70–150 pairs	B3, C6
Collared Flycatcher Ficedula albicollis	LC	breeding (2010)	10,000–25,000 pairs	B3, C2, C6

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Vrazje Blato	Other (-)	<1
2007	Donja Posavina	Other Area (-)	100

Habitat	% of IBA	Habitat detail
Artificial/Terrestrial	40	Arable land; Perennial crops, orchards and groves; Other urban and industrial areas; Ruderal land
Forest	40	Broadleaved deciduous woodland; Alluvial and very wet forest
Wetlands (inland)	20	Standing freshwater; Rivers and streams; Water fringe vegetation
Grassland	10	Humid grasslands

Land use	% of IBA
forestry	-
agriculture	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lower Posavina (Croatia). Downloaded from https://datazone.birdlife.org/site/factsheet/lower-posavina-iba-croatia on 22/12/2024.