Since 2007, a BTO-administered colour-ringing scheme has involved fitting individually marked blue plastic rings on Peregrine Falcons Falco peregrinus in southwest England. To date, over 200 Peregrine pulli have been colour-ringed, resulting in 46 recoveries, both dead and alive. The results have been mostly as expected: females have travelled farther than males, and only three (7%) of r

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