Species, GC (%), AT (%), G (bases), C (bases), A (bases), T (bases), Maximum lifespan (yrs) Parus major, 47.7, 52.3, 5631, 2370, 3796, 4979, 15.4, Periparus ater, 48.4, 51.6, 5684, 2437, 3762, 4900, 9.5, Poecile palustris, 48.3, 51.7, 5654, 2478, 3786, 4905, 11.9,