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The site was identified as important in 2000 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
Whooper Swan Cygnus cygnus	LC	passage	1997	400 individuals	B1i, C2
Goosander Mergus merganser	LC	passage	1997	3,000 individuals	A4i, B1i, C3
Red-necked Grebe Podiceps grisegena	LC	breeding	1997	101 breeding pairs	B1i, C3
White-tailed Sea-eagle Haliaeetus albicilla	LC	winter	1997	10-15 individuals	A1, C1

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2000) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2000. The most recent assessment (2010) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Red-necked Grebe Podiceps grisegena	100	65	breeding pairs	65	unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Residential and commercial development	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Pollution	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Human intrusions and disturbance	happening now	some of area/population (10-49%)	slow but significant deterioration	medium

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Some of site covered (10-49%)	No management planning has taken place	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	low

Year	Protected Area	Designation	% overlap with IBA
1965	IISSALON JA EMÄKARIN LUONNONSUOJELUALUE	Yksityinen luonnonsuojelualue	<1
1995	Harolanlahti	Site of Community Importance (Habitats Directive)	12
1995	Köyliönjärvi	Site of Community Importance (Habitats Directive)	10
1997	Pyhäjärvi	Site of Community Importance (Habitats Directive)	24
1998	Pyhäjärvi	Special Protection Area (Birds Directive)	24
1998	Harolanlahti	Special Protection Area (Birds Directive)	12
1998	Köyliönjärvi	Special Protection Area (Birds Directive)	10
2001	Kirkkosaaren ja Kaukosaaren luonnonsuojelualue	Yksityinen luonnonsuojelualue	1
2003	Köyliönjärven luonnonsuojelualue	Yksityinen luonnonsuojelualue	7
2009	Luvanlahti-Harolanlahti, Lohiluoma	Yksityinen luonnonsuojelualue	<1
2011	Tapolan luonnonsuojelualue	Yksityinen luonnonsuojelualue	4
2012	Mäkitalon luonnonsuojelualue	Yksityinen luonnonsuojelualue	<1
2012	Lähderinteen luonnonsuojelualue	Yksityinen luonnonsuojelualue	<1

Habitat1	Habitat detail	% of IBA
Wetlands (inland)	Standing freshwater	80
Artificial/Terrestrial		-
Forest	Broadleaved deciduous woodland, Mixed woodland	-
Rocky areas (eg. inland cliffs, mountain peaks)		-

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	90
water management	80
forestry	10
military	5
fisheries/aquaculture	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Köyliönjärvi and Pyhäjärvi lakes (Finland). Downloaded from https://datazone.birdlife.org/site/factsheet/köyliönjärvi-and-pyhäjärvi-lakes-iba-finland on 23/11/2024.