_53266983_taggedcuckoo1_btoA satellite-tagged Cuckoo, named Chris after wildlife presenter Chris Packham, is giving scientists at the BTO sleepless nights. Chris, who was fitted with a satellite-tag in 2011 has been providing scientists with ground-breaking information on Cuckoo migration. He left Britain on 4th July on his annual migration to Africa, arriving at his usual stop-over site in the Po valley, northern Italy...

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