| Species (N=917) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Aquila chrysaetos | 44.0 | 56.0 | 65 | 9 | 40 | 54 | 48.0 |
| Ara glaucogularis | 44.0 | 56.0 | 63 | 11 | 38 | 56 | 22.0 |
| Aratinga acuticaudata | 42.3 | 57.7 | 64 | 7 | 38 | 59 | 31.0 |
| Archilochus colubris | 38.0 | 62.0 | 56 | 9 | 41 | 65 | 9.1 |
| Arctocephalus pusillus | 34.8 | 65.2 | 55 | 16 | 52 | 81 | 32.1 |
| Arctonyx collaris | 29.5 | 70.5 | 47 | 14 | 61 | 85 | 15.8 |
| Ardea cinerea | 45.8 | 54.2 | 65 | 12 | 38 | 53 | 37.5 |
| Ardea purpurea | 44.6 | 55.4 | 63 | 12 | 39 | 54 | 25.4 |
| Arenaria interpres | 42.3 | 57.7 | 61 | 10 | 43 | 54 | 22.3 |
| Argyrosomus japonicus | 42.9 | 57.1 | 53 | 19 | 40 | 56 | 30.0 |
| Arripis trutta | 45.8 | 54.2 | 58 | 19 | 42 | 49 | 26.0 |
| Artibeus jamaicensis | 27.5 | 72.5 | 44 | 12 | 69 | 79 | 19.2 |
| Ateles belzebuth | 28.9 | 71.1 | 44 | 14 | 60 | 83 | 37.0 |
| Auxis thazard | 47.6 | 52.4 | 59 | 21 | 37 | 51 | 5.0 |
| Axis axis | 29.4 | 70.6 | 48 | 11 | 58 | 84 | 20.8 |
| Axis porcinus | 29.4 | 70.6 | 47 | 12 | 58 | 84 | 22.9 |
| Aythya americana | 47.6 | 52.4 | 67 | 13 | 31 | 57 | 22.6 |
| Aythya ferina | 48.2 | 51.8 | 67 | 14 | 31 | 56 | 23.2 |
| Aythya fuligula | 48.2 | 51.8 | 68 | 13 | 30 | 57 | 45.2 |
| Balaena mysticetus | 38.5 | 61.5 | 63 | 11 | 45 | 73 | 211.0 |
| Balaenoptera acutorostrata | 35.9 | 64.1 | 59 | 10 | 52 | 71 | 50.0 |
| Balaenoptera borealis | 34.4 | 65.6 | 55 | 11 | 55 | 71 | 74.0 |
| Balaenoptera edeni | 34.4 | 65.6 | 55 | 11 | 55 | 71 | 72.0 |
| Balaenoptera musculus | 35.9 | 64.1 | 59 | 10 | 50 | 73 | 110.0 |
| Balaenoptera physalus | 33.9 | 66.1 | 54 | 11 | 54 | 73 | 114.0 |
| Balearica regulorum | 44.0 | 56.0 | 66 | 8 | 39 | 55 | 27.2 |
| Barbatula barbatula | 42.9 | 57.1 | 47 | 25 | 40 | 56 | 7.0 |
| Basiliscus vittatus | 35.7 | 64.3 | 47 | 13 | 41 | 67 | 9.1 |
| Batrachuperus mustersi | 25.0 | 75.0 | 27 | 15 | 61 | 65 | 11.0 |
| Berardius bairdii | 37.3 | 62.7 | 59 | 16 | 53 | 73 | 84.0 |
| Beryx splendens | 49.4 | 50.6 | 67 | 16 | 33 | 52 | 23.0 |
| Betta splendens | 30.4 | 69.6 | 37 | 14 | 56 | 61 | 2.0 |
| Bison bison | 29.4 | 70.6 | 47 | 12 | 59 | 83 | 33.5 |
| Bison bonasus | 30.3 | 69.7 | 48 | 13 | 57 | 83 | 26.4 |
| Blanus cinereus | 41.8 | 58.2 | 50 | 19 | 41 | 55 | 16.0 |
| Boa constrictor | 26.8 | 73.2 | 29 | 16 | 40 | 83 | 40.4 |
| Bombina orientalis | 41.1 | 58.9 | 52 | 17 | 37 | 62 | 15.8 |
| Bombina variegata | 39.9 | 60.1 | 51 | 16 | 39 | 62 | 29.0 |
| Boreogadus saida | 41.1 | 58.9 | 54 | 15 | 46 | 53 | 7.0 |
| Bos grunniens | 28.9 | 71.1 | 46 | 12 | 59 | 84 | 26.3 |