Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Agelaius phoeniceus, 50.1, 49.9, 211, 49, 60, 199, 20.0, Euphagus cyanocephalus, 49.9, 50.1, 210, 49, 60, 200, 12.5, Quiscalus quiscula, 49.5, 50.5, 209, 48, 63, 199, 23.1,