NDFF Waterbird survey by airplane for the IJsselmeer, Markermeer and IJmeer

Latest version published by Dutch National Database of Flora and Fauna (NDFF) on Mar 27, 2018 Dutch National Database of Flora and Fauna (NDFF)

Counting birds that fly at an altitude of 500 to 600 feet (ca. 150 to 180 metres), and at an average speed of 70 to 80 knots (130 to 150 km/ph.). Birds are observed by eye or with binoculars (magnification between 7 and 10 times).

An observer does the counting and is accompanied by a writer who makes additional observations.

Positive observations without zeros.

Dataset available via https://www.ndff.nl/english / serviceteamndff@natuurloket.nl



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The table below shows only published versions of the resource that are publicly accessible.


Researchers should respect the following rights statement:

The publisher and rights holder of this work is Dutch National Database of Flora and Fauna (NDFF). This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 2dd51d10-85bb-4e3e-82b4-1dd0e8869960.  Dutch National Database of Flora and Fauna (NDFF) publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Netherlands Biodiversity Information Facility.


Metadata; Observation


Who created the resource:

Jaap Graveland

Who can answer questions about the resource:

Who filled in the metadata:

Who else was associated with the resource:

Henk de Vries
Node manager NLBIF
NLBIF (Netherlands Biodiversity Information Facility) P.O.Box 9517 2300 RA Leiden NL

Geographic Coverage

Former Zuiderzee, The Netherlands

Bounding Coordinates South West [52.241, 4.856], North East [53.114, 5.9]

Taxonomic Coverage


Class  Aves (birds)

Temporal Coverage

Formation Period 2011-current

Additional Metadata

Alternative Identifiers https://ipt.ndff.nl/resource?r=14_207_rws_vliegtuigtelling