| Species (N=919) | GC (%) | AT (%) | G (bases) | C (bases) | A (bases) | T (bases) | Maximum lifespan (yrs) |
|---|---|---|---|---|---|---|---|
| Ourebia ourebi | 42.1 | 57.9 | 392 | 258 | 454 | 441 | 15.9 |
| Ovibos moschatus | 42.5 | 57.5 | 403 | 253 | 446 | 443 | 27.4 |
| Ovis ammon | 40.5 | 59.5 | 378 | 248 | 468 | 451 | 16.8 |
| Ovis aries | 40.5 | 59.5 | 377 | 249 | 469 | 450 | 22.8 |
| Ovis canadensis | 40.2 | 59.8 | 369 | 252 | 475 | 449 | 20.6 |
| Ovophis okinavensis | 43.9 | 56.1 | 450 | 229 | 420 | 447 | 19.0 |
| Ozotoceros bezoarticus | 37.0 | 63.0 | 325 | 246 | 516 | 458 | 21.9 |
| Pagellus bogaraveo | 46.5 | 53.5 | 430 | 298 | 459 | 379 | 15.0 |
| Palea steindachneri | 41.3 | 58.7 | 387 | 251 | 454 | 453 | 41.0 |
| Paleosuchus palpebrosus | 47.0 | 53.0 | 500 | 235 | 378 | 451 | 24.1 |
| Paleosuchus trigonatus | 47.5 | 52.5 | 500 | 238 | 377 | 440 | 30.9 |
| Pan paniscus | 45.3 | 54.7 | 446 | 252 | 426 | 418 | 55.0 |
| Pan troglodytes | 46.0 | 54.0 | 453 | 256 | 420 | 413 | 59.4 |
| Pandion haliaetus | 46.0 | 54.0 | 479 | 234 | 380 | 458 | 32.0 |
| Panthera leo | 41.1 | 58.9 | 356 | 283 | 503 | 412 | 27.0 |
| Panthera onca | 42.0 | 58.0 | 364 | 285 | 485 | 411 | 28.0 |
| Panthera pardus | 41.7 | 58.3 | 359 | 285 | 489 | 412 | 27.3 |
| Panthera tigris | 43.0 | 57.0 | 369 | 295 | 479 | 402 | 26.3 |
| Papio hamadryas | 45.0 | 55.0 | 439 | 255 | 447 | 401 | 37.5 |
| Parus major | 50.2 | 49.8 | 518 | 261 | 356 | 416 | 15.4 |
| Passer domesticus | 47.4 | 52.6 | 466 | 269 | 369 | 447 | 23.0 |
| Passer montanus | 48.5 | 51.5 | 479 | 274 | 357 | 441 | 13.1 |
| Pavo cristatus | 44.9 | 55.1 | 445 | 251 | 428 | 427 | 23.2 |
| Pecari tajacu | 41.9 | 58.1 | 389 | 258 | 448 | 450 | 31.5 |
| Pelecus cultratus | 42.1 | 57.9 | 387 | 266 | 475 | 423 | 11.0 |
| Pelomedusa subrufa | 41.0 | 59.0 | 406 | 227 | 449 | 463 | 20.1 |
| Pelusios castaneus | 41.7 | 58.3 | 427 | 218 | 456 | 444 | 41.0 |
| Peponocephala electra | 40.1 | 59.9 | 373 | 249 | 481 | 448 | 47.0 |
| Perameles gunnii | 37.2 | 62.8 | 337 | 236 | 506 | 463 | 6.1 |
| Perca flavescens | 43.7 | 56.3 | 403 | 278 | 507 | 372 | 12.0 |
| Perca fluviatilis | 44.4 | 55.6 | 402 | 287 | 498 | 364 | 22.0 |
| Percopsis transmontana | 49.6 | 50.4 | 458 | 312 | 413 | 368 | 6.0 |
| Periparus ater | 50.5 | 49.5 | 524 | 260 | 349 | 418 | 9.5 |
| Perodicticus potto | 42.5 | 57.5 | 388 | 267 | 448 | 439 | 26.8 |
| Petaurista alborufus | 41.4 | 58.6 | 374 | 264 | 476 | 428 | 21.4 |
| Petaurus breviceps | 38.2 | 61.8 | 351 | 238 | 510 | 443 | 17.8 |
| Petromyzon marinus | 38.7 | 61.3 | 359 | 242 | 513 | 440 | 9.0 |
| Phacochoerus africanus | 41.2 | 58.8 | 381 | 255 | 448 | 461 | 20.9 |
| Phaeognathus hubrichti | 35.4 | 64.6 | 316 | 231 | 528 | 469 | 19.7 |
| Phaethon rubricauda | 48.9 | 51.1 | 501 | 257 | 375 | 418 | 32.7 |