Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Ciconia boyciana, 47.4, 52.6, 515, 138, 305, 420, 48.1, Ciconia ciconia, 47.2, 52.8, 518, 134, 304, 425, 39.0, Ciconia nigra, 47.7, 52.3, 522, 135, 299, 422, 31.3,