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A cuckoo has just finished
of the longest migrations ever by any bird. The cuckoo left its
home in Zambia on March the 20th and reached its breeding
in Mongolia. Ornithologists called the bird Onon after a Mongolian
. The scientists micro-chipped five cuckoos in Mongolia last
to track their
. The tags monitored the birds across the Indian Ocean and 16
. Onon was the quickest to make the
journey from Mongolia to Zambia and back. The scientists were amazed at Onon's
. They called it "a
journey".
