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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
Hazel Grouse Tetrastes bonasia	LC	breeding	1989-1993	3,500-4,500 breeding pairs	C6
Black Grouse Lyrurus tetrix	LC	breeding	1989-2002	20-50 males	C6
Whooper Swan Cygnus cygnus	LC	breeding	1989-1995	2 breeding pairs	C6
Corncrake Crex crex	LC	breeding	2004-2009	250-350 males	C1, C6
Black Stork Ciconia nigra	LC	breeding	1989-1993	15-16 breeding pairs	C6
Eurasian Pygmy-owl Glaucidium passerinum	LC	breeding	2004-2009	20-40 breeding pairs	C6
Boreal Owl Aegolius funereus	LC	breeding	2009	120 breeding pairs	C6
European Honey-buzzard Pernis apivorus	LC	breeding	1989-1999	60-75 breeding pairs	C6
Lesser Spotted Eagle Clanga pomarina	LC	breeding	1989-2003	58-59 breeding pairs	C6
Black Woodpecker Dryocopus martius	LC	breeding	1989-1993	400-600 breeding pairs	C6
Three-toed Woodpecker Picoides tridactylus	LC	breeding	2005-2008	35-50 breeding pairs	C6
Red-breasted Flycatcher Ficedula parva	LC	breeding	1989-1993	500-1,500 breeding pairs	C6

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 (2010) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Forest	poor (40-69%)	poor (40-69%)	very unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Natural system modifications	likely in short term (within 4 years)	majority/most of area/population (50-90%)	very rapid to severe deterioration	high
Agricultural expansion and intensification	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Residential and commercial development	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Transportation and service corridors	likely in short term (within 4 years)	some of area/population (10-49%)	slow but significant deterioration	medium
Invasive and other problematic species and genes	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Climate change and severe weather	past (and unlikely to return) and no longer limiting	whole area/population (>90%)	moderate to rapid deterioration	low
Pollution	past (and unlikely to return) and no longer limiting	some of area/population (10-49%)	slow but significant deterioration	low
No known threats	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Most of site (50-90%) covered (including the most critical parts for important bird species)	A management plan exists but it is out of date or not comprehensive	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	medium

Year	Protected Area	Designation	% overlap with IBA
1953	Wielki Las	Rezerwat Przyrody	<1
1954	Gola	Rezerwat Przyrody	<1
1970	Budzisk	Rezerwat Przyrody	<1
1972	Karczmisko	Rezerwat Przyrody	<1
1986	Wzgórza Sokólskie	Obszar Chronionego Krajobrazu	8
1987	Stare Biele	Rezerwat Przyrody	<1
1987	Krzemianka	Rezerwat Przyrody	<1
1987	Góra Pieszczana	Rezerwat Przyrody	<1
1987	Kulikówka	Rezerwat Przyrody	<1
1987	Jesionowe Góry	Rezerwat Przyrody	<1
1987	Stara Dêbina	Nature Reserve	<1
1988	Park Krajobrazowy Puszczy Knyszyńskiej im. profesora Witolda Sławińskiego	Park Krajobrazowy	60
1988	Surażkowo	Rezerwat Przyrody	<1
1988	Krzemienne Góry	Rezerwat Przyrody	<1
1988	Stara Dębina	Rezerwat Przyrody	<1
1988	Puszczy Knyszyñskiej im. Prof. Witolda Sóawiñskieg	Landscape Park	62
1990	Las Cieliczański	Rezerwat Przyrody	<1
1990	Bahno w Borkach	Rezerwat Przyrody	<1
1990	Jałówka	Rezerwat Przyrody	<1
1990	Międzyrzecze	Rezerwat Przyrody	<1
1990	Woronicza	Rezerwat Przyrody	<1
1990	Wielki Las	Rezerwat Przyrody	<1
1990	Krasne	Rezerwat Przyrody	<1
1990	Starodrzew Szyndzielski	Rezerwat Przyrody	<1
1990	Jaówka	Nature Reserve	<1
1996	Nietupa	Rezerwat Przyrody	<1
1997	Kozłowy Ług	Rezerwat Przyrody	<1
1999	Taboły	Rezerwat Przyrody	<1
1999	Chomontowszczyzna	Rezerwat Przyrody	<1
2001	Ostoja Knyszyńska	Site of Community Importance (Habitats Directive)	100
2007	Puszcza Knyszyńska	Special Protection Area (Birds Directive)	92

Habitat1	Habitat detail	% of IBA
Forest	Native coniferous woodland, Mixed woodland, Alluvial and very wet forest	72
Artificial/Terrestrial	Arable land, Ruderal land	15
Grassland	Humid grasslands, Mesophile grasslands	12
Other		1

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	-
forestry	-
hunting	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Knyszyn Forest (Poland). Downloaded from https://datazone.birdlife.org/site/factsheet/knyszyn-forest-iba-poland on 22/11/2024.