Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Apus apus, 44.1, 55.9, 98, 33, 75, 91, 21.1, Archilochus colubris, 47.8, 52.2, 102, 40, 70, 85, 9.1,