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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
Hazel Grouse Tetrastes bonasia	LC	breeding (2005–2009)	1,500–2,500 pairs	C6
Western Capercaillie Tetrao urogallus	LC	breeding (2008)	24–25 males	C6
European Nightjar Caprimulgus europaeus	LC	breeding (2005–2009)	80–100 pairs	C6
Corncrake Crex crex	LC	breeding (2005–2009)	250–360 males	C1, C6
Common Crane Grus grus	LC	breeding (2005–2009)	120–160 pairs	C6
Black Stork Ciconia nigra	LC	breeding (2005–2009)	10–20 pairs	C6
Great Snipe Gallinago media	NT	breeding (2008–2009)	10–14 males	C6
Black Tern Chlidonias niger	LC	breeding (2005–2009)	35–45 pairs	C6
Eurasian Pygmy-owl Glaucidium passerinum	LC	breeding (2005–2009)	20–60 pairs	C6
Boreal Owl Aegolius funereus	LC	breeding (2005–2009)	40–60 pairs	C6
European Honey-buzzard Pernis apivorus	LC	breeding (2005–2009)	60–71 pairs	C6
Lesser Spotted Eagle Clanga pomarina	LC	breeding (2005–2009)	32–39 pairs	C6
White-tailed Sea-eagle Haliaeetus albicilla	LC	breeding (2009)	10–12 pairs	C6
Red Kite Milvus milvus	LC	breeding (2005–2009)	7–10 pairs	C1
Black Kite Milvus migrans	LC	breeding (2005–2009)	8–10 pairs	C6
Grey-faced Woodpecker Picus canus	LC	breeding (2005–2009)	30–50 pairs	C6
Black Woodpecker Dryocopus martius	LC	breeding (2005–2009)	250–350 pairs	C6
Woodlark Lullula arborea	LC	breeding (2005–2009)	350–500 pairs	C6

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2011) is shown below.

State (condition of the trigger species' populations)
Species	Actual vs Reference (units)	% remaining	Result
Hazel Grouse Tetrastes bonasia	2,500 / 2,500 (pairs)	100	good
Western Capercaillie Tetrao urogallus	40 / 20 (males)	100	good
Corncrake Crex crex	500 / 360 (pairs)	100	good
Eurasian Pygmy-owl Glaucidium passerinum	60 / 15 (pairs)	100	good
Lesser Spotted Eagle Clanga pomarina	40 / 39 (pairs)	100	good
White-tailed Sea-eagle Haliaeetus albicilla	15 / 12 (pairs)	100	good

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Not assessed	Not assessed	Not assessed	not assessed

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Various III	Nature Reserve (-)	<1
1959	Kozi Rynek	Rezerwat Przyrody (IV)	<1
1959	Mały Borek	Rezerwat Przyrody (IV)	<1
1959	Tobolinka	Rezerwat Przyrody (IV)	<1
1960	Starożyn	Rezerwat Przyrody (IV)	<1
1960	Jezioro Kolno	Rezerwat Przyrody (IV)	<1
1963	Brzozowy Grąd	Rezerwat Przyrody (IV)	-
1970	Perkuć	Rezerwat Przyrody (IV)	<1
1971	Glinki	Rezerwat Przyrody (IV)	<1
1980	Jezioro Kalejty	Rezerwat Przyrody (IV)	1
1980	Stara Ruda	Rezerwat Przyrody (IV)	<1
1984	Kukle	Rezerwat Przyrody (IV)	<1
1984	Łempis	Rezerwat Przyrody (IV)	<1
1985	Kuriańskie Bagno	Rezerwat Przyrody (IV)	1
1989	Wigierski Park Narodowy	Park Narodowy (V)	11

Habitat	% of IBA	Habitat detail
Forest	85	Broadleaved deciduous woodland; Native coniferous woodland; Mixed woodland; Alluvial and very wet forest
Artificial/Terrestrial	8	Highly improved re-seeded landscapes; Arable land; Ruderal land
Wetlands (inland)	7	Standing freshwater; Rivers and streams; Raised bogs; Water fringe vegetation

Land use	% of IBA
forestry	85
nature conservation and research	23
agriculture	8
fisheries/aquaculture	5
hunting	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Augustów forest (Poland). Downloaded from https://datazone.birdlife.org/site/factsheet/augustów-forest-iba-poland on 22/12/2024.