Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Apus apus, 45.8, 54.2, 3872, 1336, 2716, 3444, 21.1, Archilochus colubris, 46.1, 53.9, 3794, 1449, 2745, 3386, 9.1,