JTweedie
Well-known member
Two Oystercatchers observed on mudflats in eastern England have been identified as being in their 40s, having been ringed back in the 1980s.
www.theguardian.com

Norfolk bird surveyors find Britain’s oldest known oystercatchers
Birds in their 40s wintering on mudflats and coastal wetlands of the Wash received leg rings in early 1980s