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The site was identified as important in 2021 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
Tundra Swan Cygnus columbianus	LC	non-breeding	2017-2020	278-282 individuals	B3a, C2

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2021) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2021. The most recent assessment (2010) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Black Tern Chlidonias niger	5	0	breeding pairs	0	very unfavourable
Short-eared Owl Asio flammeus	1	0	breeding pairs	0	very unfavourable
Western Marsh-harrier Circus aeruginosus	1	1	breeding pairs	100	favourable
Montagu's Harrier Circus pygargus	6	2	breeding pairs	34	very unfavourable

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Not assessed	Not assessed	Not assessed	not assessed

Year	Protected Area	Designation	% overlap with IBA
1983	Sønder Ådal	Special Protection Area (Birds Directive)	94
1998	Vidå med tilløb; Rudbøl Sø og Magisterkogen	Site of Community Importance (Habitats Directive)	1

Habitat1	Habitat detail	% of IBA
Artificial/Terrestrial	Arable land, Forestry plantations	70
Grassland	Humid grasslands	30

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	90
unknown	10

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Sønder Ådal (Denmark). Downloaded from https://datazone.birdlife.org/site/factsheet/sønder-ådal-iba-denmark on 23/11/2024.