Hollands Diep This is an IBA in danger! 

Country/territory: Netherlands

IBA Criteria met: B1i, C3, C6 (2016)
For more information about IBA criteria please click here

Area: 4,139 ha

Vogelbescherming Nederland
Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2018 very high not assessed high
For more information about IBA monitoring please click here

Site description
A stagnant 17-km long freshwater lake, located between Haringvliet (024) and Biesbosch (051), bordered by reedbeds and grassland polders. The water-level varies, depending on the river supply. This site, together with site 024, formed part of a single, larger site (former site NL047) in the previous international IBA inventory (Grimmett and Jones 1989).

Key biodiversity
The site is especially important for roosting geese from surrounding feeding areas, although there have been few counts of numbers. The average seasonal peak number of waterbirds during 1992-1996 exceeded 20,000.

Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Hollands Diep. Downloaded from on 08/12/2021.