| Species (N=152) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Accipiter gentilis | 44.9 | 55.1 | 247 | 60 | 162 | 215 | 22.0 |
| Accipiter nisus | 44.7 | 55.3 | 247 | 59 | 169 | 209 | 20.2 |
| Acridotheres cristatellus | 49.0 | 51.0 | 259 | 76 | 154 | 195 | 13.0 |
| Acrocephalus scirpaceus | 47.5 | 52.5 | 244 | 81 | 160 | 199 | 14.0 |
| Aegypius monachus | 46.9 | 53.1 | 253 | 68 | 163 | 200 | 39.0 |
| Agelaius phoeniceus | 46.1 | 53.9 | 240 | 75 | 171 | 198 | 20.0 |
| Aix galericulata | 49.0 | 51.0 | 251 | 84 | 157 | 192 | 10.4 |
| Alauda arvensis | 49.4 | 50.6 | 268 | 70 | 150 | 196 | 10.1 |
| Alectura lathami | 48.7 | 51.3 | 255 | 78 | 173 | 178 | 12.5 |
| Anas acuta | 50.3 | 49.7 | 260 | 84 | 150 | 190 | 27.4 |
| Anas crecca | 49.4 | 50.6 | 255 | 83 | 155 | 191 | 27.1 |
| Anas platyrhynchos | 49.1 | 50.9 | 256 | 80 | 153 | 195 | 29.1 |
| Anser albifrons | 46.8 | 53.2 | 255 | 65 | 162 | 202 | 47.0 |
| Anser anser | 45.8 | 54.2 | 250 | 63 | 166 | 205 | 31.0 |
| Anser fabalis | 45.8 | 54.2 | 238 | 75 | 159 | 212 | 25.6 |
| Anthropoides virgo | 42.5 | 57.5 | 228 | 63 | 179 | 214 | 27.0 |
| Apus apus | 46.1 | 53.9 | 249 | 66 | 167 | 202 | 21.1 |
| Aquila chrysaetos | 46.6 | 53.4 | 248 | 71 | 166 | 199 | 48.0 |
| Ara glaucogularis | 46.2 | 53.8 | 246 | 70 | 166 | 202 | 22.0 |
| Aratinga acuticaudata | 46.5 | 53.5 | 254 | 64 | 160 | 206 | 31.0 |
| Archilochus colubris | 45.2 | 54.8 | 238 | 71 | 176 | 199 | 9.1 |
| Ardea cinerea | 47.7 | 52.3 | 255 | 71 | 153 | 205 | 37.5 |
| Ardea purpurea | 46.9 | 53.1 | 255 | 66 | 154 | 209 | 25.4 |
| Arenaria interpres | 45.5 | 54.5 | 245 | 66 | 185 | 188 | 22.3 |
| Aythya americana | 48.4 | 51.6 | 253 | 78 | 159 | 194 | 22.6 |
| Aythya ferina | 48.2 | 51.8 | 253 | 77 | 159 | 195 | 23.2 |
| Aythya fuligula | 48.7 | 51.3 | 254 | 79 | 159 | 192 | 45.2 |
| Balearica regulorum | 45.2 | 54.8 | 247 | 62 | 157 | 218 | 27.2 |
| Botaurus stellaris | 43.9 | 56.1 | 239 | 61 | 170 | 214 | 11.3 |
| Branta bernicla | 48.0 | 52.0 | 254 | 74 | 161 | 195 | 28.8 |
| Branta canadensis | 47.1 | 52.9 | 253 | 69 | 161 | 201 | 42.0 |
| Bubulcus ibis | 45.8 | 54.2 | 251 | 62 | 162 | 209 | 23.0 |
| Bucorvus leadbeateri | 45.8 | 54.2 | 240 | 73 | 165 | 205 | 70.0 |
| Buteo buteo | 44.9 | 55.1 | 245 | 62 | 171 | 206 | 28.8 |
| Cacatua moluccensis | 48.1 | 51.9 | 253 | 76 | 172 | 183 | 65.8 |
| Calyptorhynchus baudinii | 44.2 | 55.8 | 244 | 58 | 176 | 206 | 47.0 |
| Cardinalis cardinalis | 46.1 | 53.9 | 239 | 76 | 174 | 195 | 28.5 |
| Carduelis pinus | 45.2 | 54.8 | 242 | 67 | 169 | 206 | 11.0 |
| Carduelis psaltria | 44.0 | 56.0 | 239 | 62 | 172 | 211 | 5.7 |
| Carduelis spinus | 45.5 | 54.5 | 244 | 67 | 167 | 206 | 13.5 |