| Species (N=152) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Accipiter gentilis | 42.9 | 57.1 | 65 | 7 | 43 | 53 | 22.0 |
| Accipiter nisus | 42.9 | 57.1 | 63 | 9 | 44 | 52 | 20.2 |
| Acridotheres cristatellus | 42.9 | 57.1 | 62 | 10 | 36 | 60 | 13.0 |
| Acrocephalus scirpaceus | 40.9 | 59.1 | 60 | 10 | 40 | 61 | 14.0 |
| Aegypius monachus | 48.8 | 51.2 | 70 | 12 | 34 | 52 | 39.0 |
| Agelaius phoeniceus | 45.2 | 54.8 | 62 | 14 | 46 | 46 | 20.0 |
| Aix galericulata | 50.6 | 49.4 | 69 | 16 | 31 | 52 | 10.4 |
| Alauda arvensis | 47.0 | 53.0 | 70 | 9 | 33 | 56 | 10.1 |
| Alectura lathami | 45.2 | 54.8 | 65 | 11 | 38 | 54 | 12.5 |
| Anas acuta | 45.2 | 54.8 | 63 | 13 | 32 | 60 | 27.4 |
| Anas crecca | 47.6 | 52.4 | 66 | 14 | 30 | 58 | 27.1 |
| Anas platyrhynchos | 45.8 | 54.2 | 65 | 12 | 31 | 60 | 29.1 |
| Anser albifrons | 46.4 | 53.6 | 66 | 12 | 34 | 56 | 47.0 |
| Anser anser | 45.2 | 54.8 | 65 | 11 | 34 | 58 | 31.0 |
| Anser fabalis | 45.2 | 54.8 | 65 | 11 | 34 | 58 | 25.6 |
| Anthropoides virgo | 42.0 | 58.0 | 65 | 8 | 43 | 58 | 27.0 |
| Apus apus | 44.6 | 55.4 | 68 | 7 | 36 | 57 | 21.1 |
| 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 |
| 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 |
| 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 |
| Balearica regulorum | 44.0 | 56.0 | 66 | 8 | 39 | 55 | 27.2 |
| Botaurus stellaris | 39.3 | 60.7 | 58 | 8 | 41 | 61 | 11.3 |
| Branta bernicla | 45.2 | 54.8 | 61 | 15 | 35 | 57 | 28.8 |
| Branta canadensis | 44.0 | 56.0 | 60 | 14 | 35 | 59 | 42.0 |
| Bubulcus ibis | 47.0 | 53.0 | 66 | 13 | 37 | 52 | 23.0 |
| Bucorvus leadbeateri | 45.5 | 54.5 | 65 | 11 | 35 | 56 | 70.0 |
| Buteo buteo | 43.5 | 56.5 | 64 | 9 | 41 | 54 | 28.8 |
| Cacatua moluccensis | 41.7 | 58.3 | 57 | 13 | 40 | 58 | 65.8 |
| Calyptorhynchus baudinii | 41.7 | 58.3 | 61 | 9 | 35 | 63 | 47.0 |
| Cardinalis cardinalis | 43.5 | 56.5 | 62 | 11 | 48 | 47 | 28.5 |
| Carduelis pinus | 42.9 | 57.1 | 60 | 12 | 45 | 51 | 11.0 |
| Carduelis psaltria | 41.7 | 58.3 | 59 | 11 | 45 | 53 | 5.7 |
| Carduelis spinus | 43.5 | 56.5 | 62 | 11 | 43 | 52 | 13.5 |