The world's oldest bird of prey nest that is still in use has been discovered in Greenland but climate change may threaten its continuing use, believe ornithologists.
Gyr Falcons will reuse a successful nest for thousands of years. Photo: Derek Bakken (Wikimedia commons)
Many birds of prey use traditional nest sites year after year. To find out just how long some nests have been in use, ornithologists in Greenland carbon dated the guano and other debris around Gyr Falcon nests.
Three other nests, each over 1,000 years old, have also been found, one of which contains feathers from a bird that lived more than 650 years ago. But one nest from central-west Greenland beat these being between 2,360 and 2,740 years old.
Lees meer: Birdwatch
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