During the 1970s we, as a ringing group in Barnsley, South Yorkshire ringed thousands of Swifts on cool summer days when they had to fly low for insects. We had recoveries in southern Europe and the odd one in Africa. Most impressive for me were the birds that we caught year after year at the local reservoirs. Some of these were well over 10 years old. Have you had any recoveries of your ringed Swifts yet Mark?
