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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	breeding	2002-2004	13 breeding pairs	B2
Merlin Falco columbarius	LC	breeding	1993-1998	9 breeding pairs	C6
Peregrine Falcon Falco peregrinus	LC	breeding	2002	7 breeding pairs	B2

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.

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
Human intrusions and disturbance	happening now	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

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90%) covered by appropriate conservation designation	A management plan exists but it is out of date or not comprehensive	Some limited conservation initiatives are in place	medium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
1948	Ysbyty Estate	Nature Reserve	26
1951	Snowdonia	National Park	100
1971	Migneint-Arenig-Dduallt	Site of Special Scientific Interest (UK)	21
1971	Cwm Cynfal	Site of Special Scientific Interest (UK)	<1
1981	Bryn Glas Quarry	Site of Special Scientific Interest (UK)	<1
1987	Castell Prysor	Site of Special Scientific Interest (UK)	<1
1992	Migneint-Arenig-Dduallt	Special Protection Area (Birds Directive)	100
2000	Migneint-Arenig-Dduallt	Site of Community Importance (Habitats Directive)	100
2001	Amnodd-Bwll Stream Section	Site of Special Scientific Interest (UK)	<1
2001	Llafar River Section	Site of Special Scientific Interest (UK)	<1

Habitat1	Habitat detail	% of IBA
Shrubland	Heathland	major (>10)
Wetlands (inland)	Blanket bogs, Rivers and streams, Standing freshwater	major (>10)
Forest	Mixed woodland	-

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Migneint - Arenig - Dduallt (United Kingdom). Downloaded from https://datazone.birdlife.org/site/factsheet/migneint--arenig--dduallt-iba-united-kingdom on 23/11/2024.