| columba livia | Yes | species | eukaryota | vertebrates | species | 8932 | click here |
| columba palumbus | Yes | species | eukaryota | vertebrates | species | 8934 | click here |
| columbidae | Yes | | | vertebrates | family | 8930 | click here |
| columbina passerina | Yes | species | eukaryota | vertebrates | species | 111974 | click here |
| columbina picui | Yes | species | eukaryota | vertebrates | species | 115618 | click here |
| columbina talpacoti | Yes | species | eukaryota | vertebrates | species | 504887 | click here |
| connochaetes taurinus | Yes | species | eukaryota | mammals | species | 9927 | click here |
| conopophaga aurita | Yes | species | eukaryota | vertebrates | species | 237657 | click here |
| coquillettidia | Yes | | | invertebrates | genus | 329110 | click here |
| coquillettidia fuscopennata | Yes | species | eukaryota | invertebrates | species | 667558 | click here |
| coquillettidia juxtamansonia | Yes | species | | | species | 2719871 | click here |
| coquillettidia metallica | Yes | species | eukaryota | invertebrates | species | 653292 | click here |
| coquillettidia perturbans | Yes | species | eukaryota | invertebrates | species | 329111 | click here |
| coquillettidia richiardii | Yes | species | | | species | 1245328 | click here |
| coquillettidia venezuelensis | Yes | species | | | species | 2488822 | click here |
| coquillettidia xanthogaster | Yes | species | eukaryota | invertebrates | species | 569586 | click here |
| coragyps atratus | Yes | species | eukaryota | vertebrates | species | 33614 | click here |
| corvus | Yes | | | vertebrates | genus | 30420 | click here |
| corvus brachyrhynchos | Yes | species | eukaryota | vertebrates | species | 85066 | click here |
| corvus corax | Yes | species | eukaryota | vertebrates | species | 56781 | click here |
| corvus cornix | Yes | species | eukaryota | vertebrates | species | 181096 | click here |
| corvus corone | Yes | species | eukaryota | vertebrates | species | 30422 | click here |
| corvus frugilegus | Yes | species | eukaryota | vertebrates | species | 75140 | click here |
| corvus hawaiiensis | Yes | species | eukaryota | vertebrates | species | 134902 | click here |
| corvus macrorhynchos | Yes | species | eukaryota | vertebrates | species | 36249 | click here |
| corvus mellori | Yes | species | | | species | 1196299 | click here |
| corvus monedula | Yes | species | eukaryota | vertebrates | species | 30423 | click here |
| corvus ossifragus | Yes | species | eukaryota | vertebrates | species | 349685 | click here |
| corvus splendens | Yes | species | eukaryota | vertebrates | species | 701737 | click here |
| coturnix japonica | Yes | species | eukaryota | vertebrates | species | 93934 | click here |
| crangon crangon | Yes | species | eukaryota | invertebrates | species | 491138 | click here |
| cricetinae | Yes | | | rodents | subfamily | 10026 | click here |
| cricetomys emini | Yes | species | eukaryota | rodents | species | 107265 | click here |
| cricetomys gambianus | Yes | species | eukaryota | rodents | species | 10085 | click here |
| cricetulus barabensis | Yes | species | eukaryota | rodents | species | 329629 | click here |
| cricetulus griseus | Yes | species | eukaryota | rodents | species | 10029 | click here |
| cricetulus migratorius | Yes | species | eukaryota | rodents | species | 10032 | click here |
| crocidura | Yes | | | mammals | genus | 36801 | click here |
| crocidura russula | Yes | species | eukaryota | mammals | species | 36802 | click here |
| crocidura suaveolens | Yes | species | eukaryota | mammals | species | 52631 | click here |
| crocodylus moreletii | Yes | species | eukaryota | vertebrates | species | 184237 | click here |
| crocodylus niloticus | Yes | species | eukaryota | vertebrates | species | 8501 | click here |
| crocodylus porosus | Yes | species | eukaryota | vertebrates | species | 8502 | click here |
| ctenocephalides felis | Yes | species | eukaryota | invertebrates | species | 7515 | click here |
| ctenodactylus gundi | Yes | species | eukaryota | rodents | species | 10166 | click here |
| ctenophthalmus agyrtes | Yes | species | eukaryota | invertebrates | species | 309191 | click here |
| culex | Yes | | | invertebrates | genus | 7174 | click here |
| culex | Yes | | | invertebrates | subgenus | 53527 | click here |
| culex annulioris | Yes | species | eukaryota | invertebrates | species | 667566 | click here |
| culex annulirostris | Yes | species | eukaryota | invertebrates | species | 162997 | click here |
| culex annulus | Yes | species | eukaryota | invertebrates | species | 182211 | click here |
| culex antennatus | Yes | species | | invertebrates | species | 911293 | click here |
| culex apicinus | Yes | species | | | species | 571207 | click here |
| culex australicus | Yes | species | eukaryota | invertebrates | species | 260110 | click here |
| culex bahamensis | Yes | species | | | species | 1206047 | click here |
| culex bastagarius | Yes | species | | | species | 1899237 | click here |
| culex bidens | Yes | species | eukaryota | invertebrates | species | 707279 | click here |
| culex bitaeniorhynchus | Yes | species | eukaryota | invertebrates | species | 69822 | click here |
| culex brethesi | Yes | species | | | species | 1091053 | click here |
| culex camposi | Yes | species | | | species | 1461356 | click here |
| culex chidesteri | Yes | species | eukaryota | invertebrates | species | 707280 | click here |
| culex clarki | Yes | species | | | species | 1899238 | click here |
| culex corniger | Yes | species | eukaryota | invertebrates | species | 707271 | click here |
| culex coronator | Yes | species | eukaryota | invertebrates | species | 526217 | click here |
| culex decens | Yes | species | eukaryota | invertebrates | species | 299630 | click here |
| culex declarator | Yes | species | eukaryota | invertebrates | species | 707281 | click here |
| culex deserticola | Yes | species | | | species | 1795353 | click here |
| culex dolosus | Yes | species | eukaryota | invertebrates | species | 707282 | click here |
| culex erraticus | Yes | species | eukaryota | invertebrates | species | 42427 | click here |
| culex erythrothorax | Yes | species | eukaryota | invertebrates | species | 42428 | click here |
| culex europaeus | Yes | species | | | species | 1464558 | click here |
| culex fuscocephala | Yes | species | eukaryota | invertebrates | species | 345740 | click here |
| culex gelidus | Yes | species | eukaryota | invertebrates | species | 308713 | click here |
| culex gnomatos | Yes | species | eukaryota | invertebrates | species | 284516 | click here |
| culex habilitator | Yes | species | | | species | 1206310 | click here |
| culex hortensis | Yes | species | | | species | 1464559 | click here |
| culex idottus | Yes | species | | | species | 1899248 | click here |
| culex imitator | Yes | species | eukaryota | invertebrates | species | 707273 | click here |
| culex impudicus | Yes | species | | | species | 1464560 | click here |
| culex infula | Yes | species | eukaryota | invertebrates | species | 308720 | click here |
| culex interfor | Yes | species | | | species | 571208 | click here |
| culex interrogator | Yes | species | eukaryota | invertebrates | species | 556016 | click here |
| culex lactator | Yes | species | eukaryota | invertebrates | species | 871896 | click here |
| culex laticinctus | Yes | species | | | species | 1464561 | click here |
| culex mimeticus | Yes | species | eukaryota | invertebrates | species | 421623 | click here |
| culex modestus | Yes | species | eukaryota | invertebrates | species | 545656 | click here |
| culex mollis | Yes | species | eukaryota | invertebrates | species | 549331 | click here |
| culex neavei | Yes | species | | | species | 864528 | click here |
| culex nigripalpus | Yes | species | eukaryota | invertebrates | species | 42429 | click here |
| culex orientalis | Yes | species | | | species | 1131597 | click here |
| culex pallidothorax | Yes | species | eukaryota | invertebrates | species | 345924 | click here |
| culex palpalis | Yes | species | eukaryota | invertebrates | species | 163000 | click here |
| culex peccator | Yes | species | | | species | 1085691 | click here |
| culex pedroi | Yes | species | eukaryota | invertebrates | species | 284558 | click here |
| culex perexiguus | Yes | species | | | species | 943103 | click here |
| culex perfuscus | Yes | species | | | species | 864588 | click here |
| culex pipiens | Yes | species | eukaryota | invertebrates | species | 7175 | click here |
| culex pipiens complex | Yes | | | invertebrates | no rank | 518105 | click here |
| culex pipiens molestus | Yes | subspecies | eukaryota | invertebrates | subspecies | 233155 | click here |
| culex pipiens pallens | Yes | subspecies | eukaryota | invertebrates | subspecies | 42434 | click here |