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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
Whooper Swan Cygnus cygnus	LC	breeding (2008)	3 pairs	C6
Corncrake Crex crex	LC	breeding (1995–2003)	55–65 males	C1
Common Crane Grus grus	LC	passage (1995–2003)	1,800–2,000 birds	C2
Common Crane Grus grus	LC	breeding (2008)	300 pairs	C6
Black Stork Ciconia nigra	LC	breeding (2008)	18 pairs	C6
Black Tern Chlidonias niger	LC	breeding (1995–2003)	40–50 pairs	C6
Lesser Spotted Eagle Clanga pomarina	LC	breeding (2008)	25 pairs	C6
White-tailed Sea-eagle Haliaeetus albicilla	LC	breeding (2008)	18 pairs	C6
Red Kite Milvus milvus	LC	breeding (2008)	16 pairs	C1, C6

Year	Protected Area	Designation (management category)	% coverage of IBA
1981	Iński Park Krajobrazowy	Park Krajobrazowy (V)	20
1985	Głowacz	Rezerwat Przyrody (IV)	<1
1985	Kamienna Buczyna	Rezerwat Przyrody (IV)	<1
1985	Goóowacz	Nature Reserve (-)	<1
1994	Wyspa Sołtyski	Rezerwat Przyrody (IV)	<1
2007	Krzemieńskie Źródliska	Rezerwat Przyrody (IV)	<1
2007	Bórbagno Miałka	Rezerwat Przyrody (IV)	<1
2009	Źródliskowe Zbocza	Rezerwat Przyrody (IV)	<1

Habitat	% of IBA	Habitat detail
Artificial/Terrestrial	57	Arable land
Forest	33	Broadleaved deciduous woodland; Mixed woodland
Grassland	5
Wetlands (inland)	4	Standing freshwater; Raised bogs; Water fringe vegetation
Other	1

Land use	% of IBA
forestry	53
agriculture	38
fisheries/aquaculture	9
hunting	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Insko Site (Poland). Downloaded from https://datazone.birdlife.org/site/factsheet/insko-site-iba-poland on 23/12/2024.