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


Stay at the forefront of British birding by taking out a subscription to British Birds.

Subscribe Now