|Most recent IBA monitoring assessment|
|Year of assessment||Threat score (pressure)||Condition score (state)||Action score (response)|
|For more information about IBA monitoring please click here|
A polder complex comprising pools, ditches, marshland, wet meadows, improved grassland and a recreational area (Twiske). The IBA is located to the north of the city of Amsterdam, adjacent to Oostzanerveld (072). This site, together with sites 068, 070 and 072, formed part of a single, larger site (former site NL038) in the previous pan-European IBA inventory (Grimmett and Jones 1989).
BirdLife International (2021) Important Bird Areas factsheet: Ilperveld, Varkensland, Oostzanerveld & Twiske . Downloaded from http://www.birdlife.org on 21/01/2021.