Assessing geographic origins of Teal (Anas crecca) through stable-hydrogen (δ 2H) isotope analyses of feathers and ring-recoveries

Management of migratory game birds must be considered at the flyway scale. Flyway delineation has generally relied on ring recoveries, yet migratory connectivity between breeding and wintering grounds is often difficult to demonstrate due to low ring-recovery rates. To overcome the limitations of ring recoveries, we here relied on stable-hydrogen isotope ratios (δ2H) from feathers of 939 hunted Teal (Anas crecca) in France in the winters of...