Within own projects at Institute for Avian Research and Vogelwarte Hiddensee, but also as contractors within the projects BeoFINO and FINOBIRD we have a great deal of experience in observing the visual fraction of bird migration and organizing such counts. This holds for seabirds, coastal birds and waterbirds as well as for terrestrial birds (e. g. raptors, passerines). The in the meantime widely distributed methodology for counts of migrating seabirds has been developped by us.
Due to collaboration in various projects of Institute for Avian Research (e. g. BeoFINO, FINOBIRD), basic experience with the measurement of non-visual bird migration by radar is available.