Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Eudyptula minor, 48.0, 52.0, 191, 58, 65, 205, 16.0, Spheniscus demersus, 48.2, 51.8, 201, 49, 56, 213, 27.3,