email a friend
printable version
Location Denmark, Sønderjyllands Amtskommune
Central coordinates 9o 27.00' East  54o 57.00' North
IBA criteria C6
Area 1,330 ha
Altitude 30 - 50m
Year of IBA assessment 2000

Dansk Ornitologisk Forening

Site description A large lake surrounded by meadows, heathland, bog and forest. Percentage cover of habitat and land-use types are poorly known.

Key Biodiversity Several species listed on Annex I of the EC Birds Directive, including Botaurus stellaris, Circus aeruginosus, Haliaeetus albicilla, Bubo bubo and Lanius collurio, have been recorded breeding at the site but no recent data are available.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
White-tailed Sea-eagle Haliaeetus albicilla resident  1996  1 breeding pairs  good  C6  Least Concern 

IBA Monitoring

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

Bubo bubo Eurasian Eagle-owl 2 2 breeding pairs 100 favourable


IUCN habitat Habitat detail Extent (% of site)
Shrubland Heathland  15%
Grassland Humid grasslands  25%
Wetlands (inland) Standing freshwater  30%
Artificial - terrestrial Arable land; Forestry plantations  30%

Land use

Land-use Extent (% of site)
agriculture 20%
forestry 15%
military 30%
unknown 45%

Protection status National None International High1,330 ha of IBA covered by Special Protection Area (Hostrup Sø, 1,330 ha).

Contribute  Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.

Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Hostrup Sø, Assenholm Mose and Felsted Vestermark. Downloaded from on 27/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife