Birds egg, Montagu's harrier, Circus pygargus (Linnaeus, 1758), in clutch of 4, found at West Jutland, Denmark, 1948

Birds egg, Montagu's harrier, Circus pygargus (Linnaeus, 1758), in clutch of 4, found at West Jutland, Denmark, 1948
Birds egg, Montagu's harrier, Circus pygargus (Linnaeus, 1758), in clutch of 4, found at West Jutland, Denmark, 1948