#Where have the swans gone?
“#Where have the swans gone?” The research was only possible because of the code some swans carry. Sightings of these tagged animals – often by citizen scientists – offer insight into the whereabouts of individual swans and changes therein. In winter, the swans favour areas with an air temperature of 5.5 °C. Credit: Bart Nolet/NIOO-KNAW…