CROW: Visualize bird migration in your browser

Peter Desmet, Nicolas Noé, Robin Brabant, Maarten Reyniers

Research output: Contribution to conferencePoster

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Every spring and autumn, millions of birds migrate over Europe. They mainly do this at high altitudes and at night, making this phenomenon largely invisible to us. But not for weather radars! We developed the open source web application “CROW” so you can explore these data directly in your browser. CROW pulls vertical profile data (vpts) from a public repository, calculates migration traffic rate (MTR), bird density and other variables, and visualizes these as interactive charts. The application can be hosted on a static file server and only visualizes data from one radar at a time, making it highly portable and scalable.

CROW was jointly developed by the Research Institute for Nature and Forest (INBO) and the Royal Meteorological Institute of Belgium (RMI) in collaboration with the Royal Belgian Institute for Natural Sciences (RBINS), with financial support from the Belgian Science Policy Office (BelSPO valorisation project CROW). It is deployed at to show bird migration in real time across the Benelux. We are planning to deploy it for data in the ENRAM data repository ( as well.
Original languageEnglish
Publication statusPublished - 25-Jun-2022

Thematic List 2020

  • Data & infrastructure

Thematic list

  • Birds

EWI Biomedical sciences

  • B280-animal-ecology

Taxonomic list

  • birds (Aves)

Geographic list

  • Belgium
  • Netherlands
  • France
  • Germany

Free keywords

  • weather radars
  • aeroecology


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