| Species (N=919) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Ourebia ourebi | 45.4 | 54.6 | 241 | 115 | 218 | 210 | 15.9 |
| Ovibos moschatus | 46.3 | 53.7 | 248 | 115 | 215 | 206 | 27.4 |
| Ovis ammon | 45.0 | 55.0 | 233 | 120 | 226 | 205 | 16.8 |
| Ovis aries | 45.3 | 54.7 | 235 | 120 | 224 | 205 | 22.8 |
| Ovis canadensis | 44.8 | 55.2 | 233 | 118 | 226 | 207 | 20.6 |
| Ovophis okinavensis | 44.0 | 56.0 | 223 | 122 | 206 | 233 | 19.0 |
| Ozotoceros bezoarticus | 39.3 | 60.7 | 192 | 116 | 269 | 207 | 21.9 |
| Pagellus bogaraveo | 48.5 | 51.5 | 240 | 141 | 216 | 188 | 15.0 |
| Palea steindachneri | 43.3 | 56.7 | 222 | 116 | 201 | 242 | 41.0 |
| Paleosuchus palpebrosus | 49.9 | 50.1 | 280 | 111 | 187 | 206 | 24.1 |
| Paleosuchus trigonatus | 50.3 | 49.7 | 277 | 117 | 191 | 199 | 30.9 |
| Pan paniscus | 44.6 | 55.4 | 243 | 107 | 215 | 219 | 55.0 |
| Pan troglodytes | 44.8 | 55.2 | 243 | 108 | 216 | 217 | 59.4 |
| Pandion haliaetus | 46.3 | 53.7 | 248 | 115 | 195 | 226 | 32.0 |
| Panthera leo | 43.8 | 56.3 | 218 | 125 | 230 | 211 | 27.0 |
| Panthera onca | 45.2 | 54.8 | 221 | 133 | 225 | 205 | 28.0 |
| Panthera pardus | 44.4 | 55.6 | 221 | 127 | 227 | 209 | 27.3 |
| Panthera tigris | 45.0 | 55.0 | 223 | 130 | 221 | 210 | 26.3 |
| Papio hamadryas | 45.0 | 55.0 | 245 | 108 | 219 | 212 | 37.5 |
| Parus major | 51.0 | 49.0 | 280 | 120 | 182 | 202 | 15.4 |
| Passer domesticus | 48.2 | 51.8 | 252 | 126 | 189 | 217 | 23.0 |
| Passer montanus | 49.5 | 50.5 | 255 | 133 | 188 | 208 | 13.1 |
| Pavo cristatus | 45.7 | 54.3 | 244 | 114 | 200 | 226 | 23.2 |
| Pecari tajacu | 45.5 | 54.5 | 237 | 120 | 207 | 220 | 31.5 |
| Pelecus cultratus | 43.9 | 56.1 | 209 | 135 | 226 | 214 | 11.0 |
| Pelomedusa subrufa | 40.1 | 59.9 | 215 | 99 | 229 | 241 | 20.1 |
| Pelusios castaneus | 42.3 | 57.7 | 233 | 99 | 221 | 232 | 41.0 |
| Peponocephala electra | 42.4 | 57.6 | 231 | 102 | 228 | 224 | 47.0 |
| Perameles gunnii | 39.0 | 61.0 | 192 | 114 | 244 | 234 | 6.1 |
| Perca flavescens | 47.3 | 52.7 | 235 | 136 | 226 | 188 | 12.0 |
| Perca fluviatilis | 47.4 | 52.6 | 237 | 135 | 224 | 189 | 22.0 |
| Percopsis transmontana | 51.7 | 48.3 | 262 | 144 | 188 | 191 | 6.0 |
| Periparus ater | 50.8 | 49.2 | 274 | 124 | 188 | 198 | 9.5 |
| Perodicticus potto | 43.6 | 56.4 | 224 | 118 | 211 | 231 | 26.8 |
| Petaurista alborufus | 43.4 | 56.6 | 217 | 123 | 236 | 208 | 21.4 |
| Petaurus breviceps | 40.3 | 59.7 | 205 | 111 | 233 | 235 | 17.8 |
| Petromyzon marinus | 41.6 | 58.4 | 210 | 117 | 239 | 220 | 9.0 |
| Phacochoerus africanus | 43.9 | 56.1 | 222 | 122 | 215 | 225 | 20.9 |
| Phaeognathus hubrichti | 36.1 | 63.9 | 163 | 120 | 272 | 229 | 19.7 |
| Phaethon rubricauda | 49.9 | 50.1 | 264 | 127 | 187 | 206 | 32.7 |