ИСТИНА

Different sources of information on migratory routes and schedules have become available over the past decade. These can be divided generally into individual- (e.g. capture-resight, capture-recapture, GPS tracking and solar geolocation) and population- level schemes (e.g. survey data). For migratory animals the relationship and differences between the movements of populations and the individuals comprising them are unclear. We compare two sources of dynamic distribution data: tracks estimated by the FLightR model from 15 solar geolocator archival tags put on and retrieved from breeding Tree Swallows at different breeding locations in the northeast US vs. spatiotemporal estimates of probability of occurrence of this species inferred from the eBird citizen science data by spatiotemporal exploratory models (STEM). The individual tracks and STEM estimates correspond quite well, though the individual tracks are much less gradual in their seasonal trajectories of movement, an effect which shows differences between micro- vs. macroscopic scales.