• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

The site was identified as important in 2007 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
Hen Harrier Circus cyaneus	LC	resident	1999-2004	11 breeding pairs	C6
Merlin Falco columbarius	LC	resident	1996-2000	12 breeding pairs	C6
Peregrine Falcon Falco peregrinus	LC	resident	2002	10 breeding pairs	C6

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2007) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2007. The most recent assessment (2007) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Circus cyaneus	14	11	breeding pairs	79	near favourable
Merlin Falco columbarius	15	12	breeding pairs	80	near favourable
Falco peregrinus	18	10	breeding pairs	56	unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Energy production and mining	likely in long term (beyond 4 years)	some of area/population (10-49%)	slow but significant deterioration	medium
Biological resource use	past (and unlikely to return) and no longer limiting	some of area/population (10-49%)	moderate to rapid deterioration	low
Human intrusions and disturbance	happening now	small area/few individuals (<10%)	slow but significant deterioration	low

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90%) covered by appropriate conservation designation	A management plan exists but it is out of date or not comprehensive	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	medium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
-	Lake Vyrnwy	RSPB Reserve	27
1951	Snowdonia	National Park	17
1976	West Llangynog Slate Mine	Site of Special Scientific Interest (UK)	<1
1977	Lake Vyrnwy	Nature Reserve	27
1983	Berwyn	Site of Special Scientific Interest (UK)	100
1985	Bryniau Clwyd a Dyffryn Dyfrdwy/Clwydian Range and Dee Valley	Area of Outstanding Natural Beauty	10
1985	Penarth Quarry	Site of Special Scientific Interest (UK)	<1
1994	Y Berwyn	National Nature Reserve	33
1995	Berwyn A Mynyddoedd De Clwyd/ Berwyn And South Clwyd Mountains	Site of Community Importance (Habitats Directive)	91
1998	Berwyn	Special Protection Area (Birds Directive)	100
2000	Pistyll Rhaeadr	Site of Special Scientific Interest (UK)	<1

Habitat1	Habitat detail	% of IBA
Grassland		-
Shrubland	Heathland	-
Wetlands (inland)	Blanket bogs, Water fringe vegetation	-

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	-
forestry	-
tourism/recreation	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Berwyn (United Kingdom). Downloaded from https://datazone.birdlife.org/site/factsheet/berwyn-iba-united-kingdom on 23/11/2024.