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Biota (Life)
Eukaryote (Eukarya)
Podiata
Unikont (Unikonta)
Opisthokont (Opisthokonta)
Holozoa
Filozoa
Apoikozoa (Choanozoa)
Animal (Animalia)
Metazoa
Epitheliozoa
Eumetazoa
Bilateria
Deuterostome (Deuterostomia)
Chordata (Chordates)
Olfactores
Craniata (Craniata (chordata))
Vertebrata (Animals with backbone)
Gnathostomata (Gnathostome)
Eugnathostomata
Teleostomi
Euteleostomi
Sarcopterygii (Lobe-finned fishes)
Dipnotetrapodomorpha
Tetrapodomorpha (Tetrapodomorph)
Tetrapoda (Tetrapod)
Reptiliomorpha
Amniota (Amniote)
Sauropsida
Reptilia (Reptiles)
Eureptilia
Romeriida
Diapsid (Diapsida)
Neodiapsida
Sauria
Lepidosauromorpha (Lepidosauromorph)
Lepidosauria
Squamata (Scaled reptiles)
Episquamata
Toxicofera
Ophidia
Serpentes (Snake)
Alethinophidia
Caenophidia (Caenophidian)
Colubroidea
Viperidae (The viper family)
Crotalinae (Pit adders)

Crotalus (463637)

Children (58 direct children, 105 direct and indirect children):

Querétaro dusky rattlesnake
Crotalus aquilus

Crotalus simus
Middle american rattlesnake

Crotalus intermedius (tree size 2)
Mexican small-headed rattlesnake

Crotalus pusillus
Tancitaran dusky rattlesnake

Crotalus lannomi
Autlán rattlesnake

Crotalus totonacus

Crotalus stejnegeri

Western diamondback rattlesnake
Western diamond-backed rattlesnake

Crotalus tigris
Tiger rattlesnake

Crotalus catalinensis
Santa catalina island rattlesnake

Crotalus lepidus (tree size 3)
Rock rattlesnake

Eastern diamondback rattlesnake
Eastern diamond-backed rattlesnake

Crotalus enyo (tree size 2)

Crotalus basiliscus (tree size 2)

Crotalus transversus

Crotalus triseriatus

Crotalus polystictus

Crotalus ravus (tree size 2)
Sistrurus ravus

Crotalus durissus (tree size 6)
Yucatan rattlesnake

Crotalus scutulatus (tree size 2)
Mojave rattlesnake

Crotalus cerastes (tree size 3)
Sidewinder rattlesnake

Timber rattlesnake (tree size 2)
Crotalus horridus

Crotalus mitchellii (tree size 3)
Speckled rattlesnake

Crotalus viridis (tree size 1)
Western rattlesnake

Crotalus willardi (tree size 5)
New mexican ridge-nosed rattlesnake

Crotalus pricei (tree size 1)
Twin-spotted rattlesnake

Western rattlesnake (tree size 7)
Northern pacific rattlesnake

Red diamond rattlesnake (tree size 2)
Crotalus ruber

Crotalus molossus (tree size 4)
Blacktail rattlesnake

Crotalus tortugensis
Tortuga island rattlesnake

Crotalus cerberus

Crotalus culminatus

Crotalus ericsmithi

Crotalus ornatus

Crotalus tancitarensis

Crotalus tzabcan
Yucatan neotropical rattlesnake

Crotalus mitchellii stephensi
Crotalus stephensi

Crotalus durissus vegrandis
Crotalus vegrandis

Crotalus lorenzoensis

Crotalus armstrongi

Crotalus campbelli

Crotalus tlaloci

Crotalus unicolor
Aruba island rattlesnake

Crotalus morulus

Crotalus adaamanteus

Crotalus sp.

Crotalus angelensis

Crotalus polisi

Crotalus thalassoporus‎

Crotalus caliginis

Crotalus concolor

Crotalus lutosus

Crotalus ehecatl

Crotalus helleri

Crotalus mictlantecuhtli

Crotalus miliarius

Crotalus piscivorus

Crotalus mutus