Country/territory: Denmark

IBA Criteria met: A4i, A4iii, B1i, B2, B3, C2, C3, C4, C6 (2000)
For more information about IBA criteria please click here

Area: 4,270 ha

Protection status:

Dansk Ornitologisk Forening
Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2010 not assessed favourable not assessed
For more information about IBA monitoring please click here

Site description
Mainly open agricultural land on a drained former lake with some small plantations. The site also includes two shallow lakes surrounded by reedbeds with Alnus forest and some heathland.

Key biodiversity
An exceptionally important staging area, particularly for Anser brachyrhynchus and A. anser. Botaurus stellaris, Branta leucopsis, Circus aeruginosus and Lanius collurio, listed on Annex I of the EC Birds Directive, breed at the site.

Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Fiilsø. Downloaded from on 16/01/2021.