The site was identified as internationally important for bird conservation in 2002 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.
Populations meeting IBA criteria ('key species') at the site:
| Species |
Red List |
Season (year/s of estimate) |
Size |
IBA criteria |
| Barnacle Goose Branta leucopsis |
LC |
winter (1990–1999) |
8,660 individuals |
A4i, B1i, B2, C2 |
| Bean Goose Anser fabalis |
LC |
winter (1990–1999) |
1,500 individuals |
B1i, C3 |
| Greater White-fronted Goose Anser albifrons |
LC |
winter (1990–1999) |
16,890 individuals |
A4i, B1i, C3 |
| A4iii Species group - waterbirds |
n/a |
winter (1990–1999) |
27,050 individuals |
A4iii, C4 |
| Habitat |
% of IBA |
Habitat detail |
| Grassland |
50 |
|
| Artificial/Terrestrial |
45 |
Arable land |
| Wetlands (inland) |
5 |
Standing freshwater |
| Land use |
% of IBA |
| agriculture |
- |
| tourism/recreation |
- |
Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Gandersum/Lange Maar (Germany). Downloaded from
https://datazone.birdlife.org/site/factsheet/gandersum-lange-maar-iba-germany on 25/01/2025.
