Reed warbler (Credit: iStockphoto/Iurii Konoval)
Eurasian reed warblers captured during their spring migrations and released after being flown 1,000 kilometers to the east can correct their travel routes and head for their original destinations.
The new evidence suggests that the birds have true navigation, meaning that they can identify at least two coordinates that roughly correspond to geographic latitude and longitude.
The findings challenge the notion held by some that birds might be limited to navigation in the north-south direction. But scientists still don’t know how they do it.