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Location Denmark, Storstrøms Amtskommune
Central coordinates 11o 50.00' East  55o 20.00' North
IBA criteria C2
Area 1,900 ha
Altitude 25 - 50m
Year of IBA assessment 2000

Dansk Ornitologisk Forening

Site description Bog areas with freshwater ponds, marshes, grazed meadows, cultivated land and woodland (including conifer plantations, areas colonized with Betula, Salix and Alnus and small areas of Fagus). Formerly most of the area was one large raised bog; the ponds are the result of the former extraction of peat.

Key Biodiversity Significant numbers (but below criteria thresholds) of wintering geese Anser fabalis and A. anser, and raptors Pernis apivorus and Circus aeruginosus use the site. Pernis apivorus and Circus aeruginosus,listed on Annex I of the EC Birds Directive, breed at the site.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Whooper Swan Cygnus cygnus winter  1994  150 individuals  good  C2  Least Concern 

IBA Monitoring

2010 not assessed favourable not assessed
Good - based on reliable and complete / representative data

Botaurus stellaris Eurasian Bittern 2 2 breeding pairs 100 favourable
Crex crex Corncrake 21 21 breeding pairs 100 favourable
Lanius collurio Red-backed Shrike 2 2 breeding pairs 100 favourable

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Holmeg Major Conservation Area 326 protected area contained by site 326  


IUCN habitat Habitat detail Extent (% of site)
Forest   35%
Wetlands (inland) Raised bogs; Standing freshwater  55%
Artificial - terrestrial Arable land  10%

Land use

Land-use Extent (% of site)
hunting 100%
agriculture 15%
forestry 10%

Protection status National Partial International High1,900 ha of IBA covered by Special Protection Area (Holmegårdsmose and Porsmose, 1,900 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Holmegård Mose & Porsmose. Downloaded from on 28/10/2016

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