Marstal Bugt and the coast of south-west Langeland

IBA Justification

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'):
Species Current IUCN Red List Category Season Year(s) Population estimate at site IBA criteria met
A4iv Species group - soaring birds/cranes n/a passage 1993-1996 11,000 individuals B1iv, C5

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2000).

IBA Conservation

IBA conservation assessment
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2010 very unfavourable not assessed not assessed
Was the whole site assessed? State assessed by Accuracy of information
yes population good

State (condition of the trigger species' populations)
Scientific name Common name Reference population Actual population Units % of population remaining Result
Cygnus olor Mute Swan 174 174 individuals 100 favourable
Cygnus cygnus Whooper Swan 221 221 individuals 100 favourable
Branta leucopsis Barnacle Goose 1710 1710 individuals 100 favourable
Clangula hyemalis Long-tailed Duck 4500 1700 individuals 38 very unfavourable
Porzana porzana Spotted Crake 4 0 breeding pairs 0 very unfavourable
Recurvirostra avosetta Pied Avocet 31 23 breeding pairs 75 near favourable
Sterna hirundo Common Tern 8 8 breeding pairs 100 favourable
Lanius collurio Red-backed Shrike 3 3 breeding pairs 100 favourable

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation Management planning Other conservation action Result
Not assessed Not assessed Not assessed not assessed
For more information about IBA conservation status, please click here

IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA with IBA (ha)
Sydfynske Øhav Site of Community Importance (Habitats Directive) 44,986 protected area contains site 4,980
Sydfynske Øhav Special Protection Area (Birds Directive) 38,175 protected area is adjacent to site 0
Stubhaven Næs Fredet ved afgørelse, exl. Kirkeomgivelser 4 protected area contained by site 0
South Funen sea with islands Baltic Sea Protected Area (HELCOM) 44,986 protected area contains site 0
Marstal Bugt og den sydlige del af Langeland Special Protection Area (Birds Directive) 4,984 protected area contained by site 4,980
Langeland Kommune §3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv) 2,437 protected area overlaps with site 0


Habitat (IUCN level 1) Habitat detail Extent (% of site)
Forest Broadleaved deciduous woodland -
Grassland Humid grasslands -
Artificial/Terrestrial Arable land -
Marine Neritic -
Marine Coastal/Supratidal -
For more information about the IUCN Habitat classification, please click here.

Land use

Land-use Extent (% of site)
agriculture -
nature conservation and research -
forestry -
unknown -

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Marstal Bugt and the coast of south-west Langeland. Downloaded from on 24/09/2023.