| Species (N=152) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Accipiter gentilis | 45.2 | 54.8 | 676 | 483 | 548 | 859 | 22.0 |
| Accipiter nisus | 45.9 | 54.1 | 698 | 482 | 549 | 844 | 20.2 |
| Acridotheres cristatellus | 46.7 | 53.3 | 668 | 535 | 537 | 837 | 13.0 |
| Acrocephalus scirpaceus | 46.7 | 53.3 | 674 | 531 | 523 | 852 | 14.0 |
| Aegypius monachus | 47.1 | 52.9 | 723 | 507 | 533 | 846 | 39.0 |
| Agelaius phoeniceus | 45.9 | 54.1 | 665 | 515 | 537 | 855 | 20.0 |
| Aix galericulata | 46.8 | 53.2 | 696 | 521 | 515 | 867 | 10.4 |
| Alauda arvensis | 47.7 | 52.3 | 683 | 538 | 511 | 828 | 10.1 |
| Alectura lathami | 47.9 | 52.1 | 749 | 495 | 503 | 848 | 12.5 |
| Anas acuta | 47.1 | 52.9 | 690 | 529 | 511 | 859 | 27.4 |
| Anas crecca | 46.9 | 53.1 | 690 | 523 | 511 | 865 | 27.1 |
| Anas platyrhynchos | 46.9 | 53.1 | 682 | 532 | 516 | 857 | 29.1 |
| Anser albifrons | 46.5 | 53.5 | 682 | 525 | 529 | 861 | 47.0 |
| Anser anser | 46.6 | 53.4 | 687 | 523 | 529 | 859 | 31.0 |
| Anser fabalis | 46.0 | 54.0 | 574 | 464 | 468 | 749 | 25.6 |
| Anthropoides virgo | 45.6 | 54.4 | 687 | 482 | 538 | 856 | 27.0 |
| Apus apus | 45.6 | 54.4 | 697 | 475 | 528 | 872 | 21.1 |
| Aquila chrysaetos | 47.7 | 52.3 | 693 | 501 | 518 | 793 | 48.0 |
| Ara glaucogularis | 49.3 | 50.7 | 778 | 474 | 454 | 832 | 22.0 |
| Aratinga acuticaudata | 49.1 | 50.9 | 778 | 474 | 465 | 835 | 31.0 |
| Archilochus colubris | 45.8 | 54.2 | 676 | 493 | 532 | 852 | 9.1 |
| Ardea cinerea | 46.1 | 53.9 | 687 | 499 | 547 | 838 | 37.5 |
| Ardea purpurea | 46.2 | 53.8 | 683 | 498 | 547 | 831 | 25.4 |
| Arenaria interpres | 44.7 | 55.3 | 660 | 487 | 570 | 848 | 22.3 |
| Aythya americana | 46.8 | 53.2 | 693 | 517 | 503 | 873 | 22.6 |
| Aythya ferina | 46.7 | 53.3 | 696 | 511 | 500 | 879 | 23.2 |
| Aythya fuligula | 46.5 | 53.5 | 690 | 514 | 507 | 876 | 45.2 |
| Balearica regulorum | 46.8 | 53.2 | 715 | 489 | 512 | 856 | 27.2 |
| Botaurus stellaris | 44.9 | 55.1 | 674 | 483 | 564 | 858 | 11.3 |
| Branta bernicla | 46.8 | 53.2 | 686 | 527 | 518 | 862 | 28.8 |
| Branta canadensis | 46.7 | 53.3 | 680 | 530 | 524 | 857 | 42.0 |
| Bubulcus ibis | 46.0 | 54.0 | 687 | 489 | 538 | 845 | 23.0 |
| Bucorvus leadbeateri | 47.2 | 52.8 | 708 | 506 | 509 | 850 | 70.0 |
| Buteo buteo | 46.3 | 53.7 | 707 | 482 | 537 | 844 | 28.8 |
| Cacatua moluccensis | 48.7 | 50.1 | 760 | 494 | 470 | 820 | 65.8 |
| Calyptorhynchus baudinii | 47.5 | 51.0 | 752 | 471 | 461 | 854 | 47.0 |
| Cardinalis cardinalis | 45.8 | 54.2 | 657 | 522 | 548 | 846 | 28.5 |
| Carduelis pinus | 45.0 | 55.0 | 640 | 518 | 560 | 853 | 11.0 |
| Carduelis psaltria | 45.2 | 54.8 | 642 | 520 | 552 | 858 | 5.7 |
| Carduelis spinus | 45.4 | 54.6 | 646 | 521 | 553 | 853 | 13.5 |