Taxonomy: families

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Snakes (Serpentes)    Genera Afronatrix West African Brown Water Snake Amphiesma South Asian Keelbacks Amphiesmoides White-eyed Keelback Anoplohydrus Sumatran Keelback Aspidura Roughsides Atretium South Asian Olive Keelback Ceratophallus Indonesian Striped Keelback Clonophis Ohio Valley Water Snake Fowlea Fishing Keelbacks Haldea Rough Earth Snake Hebius Oriental Equatorial Keelbacks Helophis Congolese Mud Snake Herpetoreas Himalayan Mountain Keelbacks Hydrablabes Bornean Water Snakes Hydraethiops Central African Water Snakes Iguanognathus Iguana-jawed Snake Isanophis Isan Keeled Stream Snake Limnophis Striped Swamp Snakes Liodytes North American Swamp Snakes Lycognathophis Seychelles Cliff Snake Natriciteres African Marsh Snakes Natrix Eurasian Keelbacks Nerodia North American Water Snakes Opisthotropis Mountain Stream Keelbacks Pseudagkistrodon False Habu Regina Queen Snakes Rhabdophis Asian Keelbacks Rhabdops South Asian Forest Snakes Sahyadriophis Sahyadri Keelbacks Smithophis Rain Snakes Storeria North American Brown Snakes Thamnophis North American Garter and Ribbon Snakes Trachischium Oriental Slender Snakes Trimerodytes Asian Water Snakes Tropidoclonion Lined Snake Tropidonophis Indo-Australian Keelbacks Virginia Smooth Earth Snake Xenochrophis Oriental Painted Keelbacks

Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk). Latest update: August 22nd, 2026. Biodiversity of the family Natricidae Bibliography of the family Natricidae Natricidae Keelbacks Kielrückennattern     Kølsnoge Contents: Endemicity: 38 genera of which 12 (31.6%) are endemic   0% 100% 287 species of which 169 (58.9%) are endemic   0% 100% Remarks: Previously included in the family Colubridae. Regarded herein as a separate family, following O'Shea (2023) and Wallach (2026). Distribution:  North America, Central America, Africa, Europe, Asia, Malay Archipelago, N. Australia. Reported from: Afghanistan, Albania, Algeria, Angola, Armenia, Australia, Austria, Azerbaijan, Bangladesh, Belarus, Belgium, Belize, Benin, Bhutan, Bosnia-Herzegovina, Botswana, Brunei, Bulgaria, Burkina Faso, Burundi, Cambodia, Cameroon, Canada, Central African Republic, Chad, China, Congo-Brazzaville, Congo-Kinshasa, Costa Rica, Croatia, Cyprus, Czech Republic, Denmark, Egypt, El Salvador, Equatorial Guinea, Estonia, Ethiopia, Finland, France, Gabon, Georgia, Germany, Ghana, Gibraltar, Greece, Guatemala, Guinea, Guinea-Bissau, Honduras, Hungary, India, Indonesia, Iran, Iraq, Israel, Italy, Ivory Coast, Japan, Jordan, Kazakhstan, Kenya, Laos, Latvia, Lebanon, Liberia, Libya, Liechtenstein, Lithuania, Luxembourg, Malawi, Malaysia, Mali, Mexico, Moldova, Mongolia, Montenegro, Morocco, Mozambique, Myanmar, Namibia, Nepal, Netherlands, Nicaragua, Niger, Nigeria, North Korea, North Macedonia, Norway, Pakistan, Papua New Guinea, Philippines, Poland, Portugal, Romania, Russia, Rwanda, San Marino, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Somalia, South Africa, South Korea, South Sudan, Spain, Sri Lanka, Sudan, Sweden, Switzerland, Syria, Taiwan, Tajikistan, Tanzania, Thailand, Togo, Tunisia, Turkey, Turkmenistan, Uganda, Ukraine, United Kingdom, USA, Uzbekistan, Vietnam, Zambia, Zimbabwe. Meristic and other data of the world's snakes. Compiled by V. Wallach Key to abbreviations Head drawings of the world's snakes (menu). Compiled by V. Wallach