Animals — 36,937 Species
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Mexican Cantil
Agkistrodon bilineatus Günther, 1863
Agkistrodon bilineatus, the cantil, is a heavy-bodied ovoviviparous viper found along the Pacific side of Mexico and Central America.
Northern Cottonmouth
Agkistrodon piscivorus (Lacépède, 1789)
Agkistrodon piscivorus, the cottonmouth, is a large venomous North American pit viper strongly associated with aquatic and semi-aquatic habitats.
Florida Cottonmouth
Agkistrodon conanti Gloyd, 1969
Agkistrodon conanti, the Florida cottonmouth, is a North American pit viper described by size, markings, distribution, habitat, and reproduction.
Broad-banded Copperhead
Agkistrodon laticinctus Gloyd & Conant, 1934
This is a description of the broad-banded copperhead, Agkistrodon laticinctus, covering its appearance, range, habitat, and natural history.
Eastern Copperhead
Agkistrodon contortrix (Linnaeus, 1766)
This is a detailed morphological, distributional, and reproductive description of the North American pit viper Agkistrodon contortrix, the eastern copperhead.
Chinese Moccasin
Deinagkistrodon acutus (Günther, 1888)
This page describes the morphology, distribution, habitat, reproduction, and venom uses of the pit viper Deinagkistrodon acutus.
Neotropical Rattlesnake
Crotalus durissus Linnaeus, 1758
Crotalus durissus is a large Neotropical South American rattlesnake with a seasonal ovoviviparous reproductive cycle.
Totonacan Rattlesnake
Crotalus totonacus Gloyd & Kauffeld, 1940
Crotalus totonacus is a venomous pitviper found in northeastern Mexico, with adults often exceeding 150 cm in length.
Yucatán Neotropical Rattlesnake
Crotalus tzabcan Klauber, 1952
The Yucatán neotropical rattlesnake (Crotalus tzabcan) is a Viperidae pit viper elevated to full species in 2005.
Northwestern Neotropical Rattlesnake
Crotalus culminatus Klauber, 1952
Crotalus culminatus, the Northwestern Neotropical rattlesnake, is a large venomous snake found in southwestern Mexico.
Ridge-nosed Rattlesnake
Crotalus willardi Meek, 1905
Crotalus willardi is a small, reclusive high-elevation rattlesnake native to southwestern North America that gives birth to live young.
Arizona Black Rattlesnake
Crotalus cerberus (Coues, 1875)
Crotalus cerberus, the Arizona black rattlesnake, is a pit viper found in the southwestern US with variable patterning and complex social behavior.
Mojave Rattlesnake
Crotalus scutulatus Kennicott, 1861
This is a detailed description of the Mohave Rattlesnake, Crotalus scutulatus, covering size, identification, genetics, taxonomy, range and habitat.
Dusky Rattlesnake
Crotalus triseriatus Wagler, 1830
Crotalus triseriatus is a small Mexican rattlesnake found in highland habitats of the Transverse Volcanic Cordillera.
Red Diamond Rattlesnake
Crotalus ruber Cope, 1892
Crotalus ruber (red diamond rattlesnake) is a moderately large reddish rattlesnake found in northwestern Mexico and southwestern California.
Twin-spotted Rattlesnake
Crotalus pricei Van Denburgh, 1895
Crotalus pricei is a small rattlesnake found in southeastern Arizona and northern Mexico, with distinct paired dorsal blotches.
Panamint Rattlesnake
Crotalus stephensi Klauber, 1930
Crotalus stephensi is a rattlesnake species native to mid-elevation desert mountains of California and Nevada.
Rock Rattlesnake
Crotalus lepidus Kennicott, 1861
Crotalus lepidus Kennicott, 1861 is a small ovoviviparous rattlesnake found in the southwestern US and northern central Mexico.
Mexican Smallhead Rattlesnake
Crotalus intermedius Troschel, 1865
Crotalus intermedius is a small rattlesnake found in central and southern Mexico at 2000–3200 m elevation.
Timber Rattlesnake
Crotalus horridus Linnaeus, 1758
Crotalus horridus, the timber rattlesnake, is a venomous snake native to eastern US deciduous forests.
Lower California Rattlesnake
Crotalus enyo Cope, 1861
Crotalus enyo is a small-headed rattlesnake found in Baja California and surrounding Gulf islands with varied arid habitats.
Sidewinder
Crotalus cerastes Hallowell, 1854
Crotalus cerastes, or sidewinder/horned rattlesnake, is a small desert viper with characteristic supraocular eye horns.
Cross-banded Mountain Rattlesnake
Crotalus transversus Taylor, 1944
Crotalus transversus Taylor, 1944 is a rattlesnake found only in high-elevation temperate boreal forests of central Mexico.
Tiger Rattlesnake
Crotalus tigris Kennicott, 1859
Crotalus tigris (tiger rattlesnake) is a small rattlesnake native to the southwestern US and northwestern Mexico.
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