| Species (N=152) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Accipiter gentilis | 44.1 | 55.9 | 5737 | 2320 | 4396 | 5812 | 22.0 |
| Accipiter nisus | 43.0 | 57.0 | 5643 | 2382 | 4778 | 5844 | 20.2 |
| Acridotheres cristatellus | 47.7 | 52.3 | 5467 | 2549 | 3807 | 4997 | 13.0 |
| Acrocephalus scirpaceus | 47.9 | 52.1 | 5771 | 2805 | 4087 | 5240 | 14.0 |
| Aegypius monachus | 46.0 | 54.0 | 5656 | 2531 | 4341 | 5283 | 39.0 |
| Agelaius phoeniceus | 45.9 | 54.1 | 5330 | 2371 | 3983 | 5091 | 20.0 |
| Aix galericulata | 48.4 | 51.6 | 5441 | 2601 | 3712 | 4851 | 10.4 |
| Alauda arvensis | 47.7 | 52.3 | 5618 | 2506 | 3913 | 4981 | 10.1 |
| Alectura lathami | 47.3 | 52.7 | 5395 | 2506 | 3971 | 4825 | 12.5 |
| Anas acuta | 49.1 | 50.9 | 5455 | 2695 | 3672 | 4777 | 27.4 |
| Anas crecca | 48.6 | 51.4 | 5418 | 2650 | 3711 | 4822 | 27.1 |
| Anas platyrhynchos | 48.6 | 51.4 | 5448 | 2620 | 3687 | 4849 | 29.1 |
| Anser albifrons | 47.2 | 52.8 | 5364 | 2540 | 3787 | 5046 | 47.0 |
| Anser anser | 47.2 | 52.8 | 5379 | 2527 | 3780 | 5052 | 31.0 |
| Anser fabalis | 47.2 | 52.8 | 5314 | 2563 | 3793 | 5018 | 25.6 |
| Anthropoides virgo | 44.6 | 55.4 | 5116 | 2258 | 3998 | 5169 | 27.0 |
| Apus apus | 44.7 | 55.3 | 5370 | 2248 | 4075 | 5344 | 21.1 |
| Aquila chrysaetos | 46.7 | 53.3 | 5657 | 2431 | 4091 | 5153 | 48.0 |
| Ara glaucogularis | 46.4 | 53.6 | 5479 | 2406 | 3979 | 5119 | 22.0 |
| Aratinga acuticaudata | 46.3 | 53.7 | 5495 | 2374 | 3970 | 5158 | 31.0 |
| Archilochus colubris | 45.5 | 54.5 | 5114 | 2326 | 3903 | 5009 | 9.1 |
| Ardea cinerea | 45.2 | 54.8 | 5765 | 2690 | 4528 | 5720 | 37.5 |
| Ardea purpurea | 45.1 | 54.9 | 5768 | 2678 | 4523 | 5753 | 25.4 |
| Arenaria interpres | 44.7 | 55.3 | 5138 | 2331 | 4132 | 5124 | 22.3 |
| Aythya americana | 48.4 | 51.6 | 5442 | 2596 | 3695 | 4883 | 22.6 |
| Aythya ferina | 48.4 | 51.6 | 5455 | 2586 | 3687 | 4888 | 23.2 |
| Aythya fuligula | 48.4 | 51.6 | 5462 | 2579 | 3686 | 4889 | 45.2 |
| Balearica regulorum | 44.9 | 55.1 | 5252 | 2295 | 3964 | 5291 | 27.2 |
| Botaurus stellaris | 42.6 | 57.4 | 6112 | 2559 | 5170 | 6509 | 11.3 |
| Branta bernicla | 47.4 | 52.6 | 5625 | 2689 | 3979 | 5231 | 28.8 |
| Branta canadensis | 47.2 | 52.8 | 5375 | 2538 | 3788 | 5059 | 42.0 |
| Bubulcus ibis | 44.0 | 56.0 | 5760 | 2575 | 4670 | 5954 | 23.0 |
| Bucorvus leadbeateri | 46.9 | 53.1 | 5571 | 2433 | 3833 | 5224 | 70.0 |
| Buteo buteo | 44.8 | 55.2 | 5919 | 2456 | 4491 | 5808 | 28.8 |
| Cacatua moluccensis | 46.8 | 52.7 | 5381 | 2490 | 3956 | 4918 | 65.8 |
| Calyptorhynchus baudinii | 44.3 | 55.1 | 5180 | 2282 | 4045 | 5235 | 47.0 |
| Cardinalis cardinalis | 45.1 | 54.9 | 5132 | 2427 | 4216 | 4997 | 28.5 |
| Carduelis pinus | 45.2 | 54.8 | 5265 | 2331 | 4012 | 5203 | 11.0 |
| Carduelis psaltria | 44.7 | 55.3 | 5200 | 2315 | 4076 | 5221 | 5.7 |
| Carduelis spinus | 45.0 | 55.0 | 5261 | 2320 | 4030 | 5217 | 13.5 |