Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Apus apus, 45.6, 54.4, 697, 475, 528, 872, 21.1, Archilochus colubris, 45.8, 54.2, 676, 493, 532, 852, 9.1,