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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
Common Crane Grus grus	LC	breeding	1996	11-50 breeding pairs	B2, C6
Wood Sandpiper Tringa glareola	LC	breeding	1996	501-1,000 breeding pairs	B2
Short-eared Owl Asio flammeus	LC	breeding	1996	11-50 breeding pairs	B2, C6
Common Redstart Phoenicurus phoenicurus	LC	breeding	1996	501-1,000 breeding pairs	B2
Parrot Crossbill Loxia pytyopsittacus	LC	breeding	1996	51-100 breeding pairs	B3

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
Common Crane Grus grus	250	250	breeding pairs	100	favourable
Wood Sandpiper Tringa glareola	825	825	breeding pairs	100	favourable
Common Redstart Phoenicurus phoenicurus	750	1,000	breeding pairs	100	favourable
Parrot Crossbill Loxia pytyopsittacus	120	120	breeding pairs	100	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Natural system modifications	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
Whole area of site (>90%) covered by appropriate conservation designation	A management plan exists but it is out of date or not comprehensive	Some limited conservation initiatives are in place	medium

Year	Protected Area	Designation	% overlap with IBA
1981	Oravisuon-Näätäsuon-Sammakkosuon soidensuojelualue	Soidensuojelualue	45
1981	Olvassuon luonnonpuisto	Luonnonpuisto	22
1988	Leväsuon-Kärppäsuon soidensuojelualue	Soidensuojelualue	13
1996	Olvassuo	Site of Community Importance (Habitats Directive)	96
1998	Olvassuo	Special Protection Area (Birds Directive)	98
2003	RYÖMÄN LUONNONSUOJELUALUE	Yksityinen luonnonsuojelualue	<1
2004	Olvassuo Mires	Ramsar Site, Wetland of International Importance	98

Habitat1	Habitat detail	% of IBA
Wetlands (inland)	Raised bogs	80
Forest	Native coniferous woodland	20

1. IUCN Habitat classification.

Land use	% of IBA
unknown	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Olvassuo-Oravisuo-Näätäsuo-Sammakkosuo (Finland). Downloaded from https://datazone.birdlife.org/site/factsheet/olvassuo-oravisuo-näätäsuo-sammakkosuo-iba-finland on 23/11/2024.