Study of habitat use, breeding ecology and movements of birds. Specialised in the use of radar, GPS loggers, radio-tags (dutch), satellite transmitters, geolocators.

With dataloggers now less than 1g, even small species of birds can be followed. Most recently, we have been involved with projects on barn swallows, arctic terns and black terns.

Arctic terns breeding in the northern part of the Netherlands were fitted with geolocators. Their route is the longest bird migration route recorded so far.