Displaced cuckoos' migration

Eleven cuckoos were relocated from Denmark to Spain. Red lines show the displaced cuckoos' migration route to Central Africa via targeted stopover sites and back to Denmark. Black lines show the normal migration route of cuckoos from Denmark to Central Africa and back again. Research led by the Center for Macroecology, Evolution and Climate at the Natural History Museum of Denmark at the University of Copenhagen. Credit: Mikkel Willemoes