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Ovoviviparous animals

258 species

Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a term used as a "bridging" form of reproduction between egg-laying oviparous and live-bearing viviparous reproduction. Ovoviviparous animals possess embryos that develop inside eggs that remain in the mother's body until they are ready to hatch. Ovoviviparous animals are similar to viviparous species in which there is internal fertilization and the young are born alive but differ in that there is no placental connection and the unborn young are nourished by egg yolk; the mother's body does provide gas exchange.

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Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a term used as a "bridging" form of reproduction between egg-laying oviparous and live-bearing viviparous reproduction. Ovoviviparous animals possess embryos that develop inside eggs that remain in the mother's body until they are ready to hatch. Ovoviviparous animals are similar to viviparous species in which there is internal fertilization and the young are born alive but differ in that there is no placental connection and the unborn young are nourished by egg yolk; the mother's body does provide gas exchange.

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Water Moccasin

Agkistrodon piscivorus

The Water moccasin (Agkistrodon piscivorus) is a species of venomous pit viper. It is one of the world's few semiaquatic vipers (along with the Florida cottonmouth) and is native to the southeastern United States. As an adult, it is large and...

Common European Adder

Vipera berus

The Common European adder (Vipera berus) is a venomous snake that is very widespread and can be found throughout most of central and eastern Europe and as far as East Asia. Known by a host of common names including Common adder and Common viper,...

Green Anaconda

Eunectes murinus

The Green anaconda (Eunectes murinus) is a boa species found in South America. It is the heaviest and one of the longest-known extant snake species. Like all boas, it is a non-venomous constrictor.

Russell's Viper

Daboia russelii

Russell's viper (Daboia russelii) is a venomous snake found in Asia. The species is named for Patrick Russell, a Scottish herpetologist who first described many of India's snakes. In Bengali, this snake is called Chandroborha since it carries...

Slowworm

Anguis fragilis

The Slow worm1 (Anguis fragilis) is a reptile native to western Eurasia. It is also called a deaf adder, a slowworm, a blindworm, or regionally, a long-cripple and hazelworm. These legless lizards are also sometimes called common slowworms. The...

Eastern Diamondback Rattlesnake

Crotalus adamanteus

The Eastern diamondback rattlesnake (Crotalus adamanteus) is a species of venomous pit viper that is found only in the southeastern United States. It has the reputation of being the most dangerous venomous snake in North America.

Brown Snake

Storeria dekayi

The Brown snake (Storeria dekayi) is a small non-venomous species of snake native to North and Central America.

Fire salamander

Salamandra salamandra

The fire salamander (Salamandra salamandra ) is a common species of salamander found in Europe.It is black with yellow spots or stripes to a varying degree; some specimens can be nearly completely black while on others the yellow is dominant. Shades...

Red-Bellied Black Snake

Pseudechis porphyriacus

The Red-bellied black snake (Pseudechis porphyriacus) is a species of venomous snake native to Australia. Originally described by George Shaw in 1794 as a species new to science, it is one of eastern Australia's most commonly encountered snakes. It...

Long-Nosed Whip Snake

Ahaetulla nasuta

The Long-nosed whip snake (Ahaetulla nasuta) is a mildly venomous, slender green tree snake native to Sri Lanka. It is a diurnal predator that uses its binocular vision to hunt prey.

Ribbon Snake

Thamnophis saurita

The Ribbon snake (Thamnophis saurita) is a common species of garter snake native to Eastern North America. It is a non-venomous species of snake. It prefers to live in wet habitats and hibernates during the winter months.

Nose-Horned Viper

Vipera ammodytes

The Nose-horned viper (Vipera ammodytes) is a venomous species found in southern Europe. It is reputed to be the most dangerous of the European vipers due to its large size, long fangs (up to 13 mm), and high venom toxicity. The specific name,...

Indian Saw-Scaled Viper

Echis carinatus

The Indian saw-scaled viper (Echis carinatus) is a venomous viper species native to Asia. It is the smallest member of the big four snakes that are responsible for causing the most snakebite cases and deaths.

Diamondback Water Snake

Nerodia rhombifer

The Diamondback water snake (Nerodia rhombifer) is a species of nonvenomous colubrid native to North America. It was first described as Tropidonotus rhombifer by Edward Hallowell in 1852.

Yellow-Bellied Sea Snake

Hydrophis platurus

The Yellow-bellied sea snake (Hydrophis platurus) is a venomous species of snake found in tropical oceanic waters around the world except for the Atlantic Ocean. It is one of the most widely distributed snakes in the world. Yellow-bellied sea snakes...

Eastern Garter Snake

Thamnophis sirtalis sirtalis

The Eastern garter snake (Thamnophis sirtalis sirtalis) is a medium-sized non-venomous snake that is native to North America. Its scientific name 'Thamnophis sirtalis sirtalis' is a combination of Ancient Greek and New Latin that means "bush snake...

Rinkhals

Hemachatus haemachatus

The rinkhals (Hemachatus haemachatus) is a venomous elapid found in parts of southern Africa. It is not a true cobra in that it does not belong to the genus Naja. While rinkhals bear a great resemblance to true cobras they also possess some...

Great white shark

Carcharodon carcharias

The great white shark (Carcharodon carcharias), also known as the white shark, white pointer, or simply great white, is a species of large mackerel shark which can be found in the coastal surface waters of all the major oceans. It is the only known...

Emerald Tree Boa

Corallus caninus

The Emerald tree boa (Corallus caninus) is a boa species found in the rainforests of South America. Like all other boas, it is nonvenomous and kill their prey by constriction.

Plain-Bellied Water Snake

Nerodia erythrogaster

Nerodia erythrogaster, commonly known as the plain-bellied water snake or plainbelly water snake, is a familiar species of mostly aquatic, nonvenomous, colubrid snake endemic to the United States.

Asp Viper

Vipera aspis

The Asp viper (Vipera aspis) is a venomous snake found in southwestern Europe. Bites from this species can be very painful and about 4% of all untreated bites are fatal.

Indian Sand Boa

Eryx johnii

The Indian sand boa (Eryx johnii) is a nonvenomous snake native to Western and South Asia. This species is also known as John's sand boa, erutaley nagam, mannoli pambu, Red sand boa, and Brown sand boa.

Queen Snake

Regina septemvittata

The Queen snake (Regina septemvittata) is a nonvenomous semiaquatic snake, native to North America. They are active during the day and are often found among rocks or near streams and often come out of the water to warm in the sun.

Eyelash Viper

Bothriechis schlegelii

The Eyelash viper (Bothriechis schlegelii) is an arboreal venomous pit viper species found in Central and South America. This species is characterized by a wide array of color variations, as well as the superciliary scales above the eyes. It is the...

Brown Water Snake

Nerodia taxispilota

The Brown water snake (Nerodia taxispilota ) is a large nonvenomous natricine snake found only in the southeastern United States. This snake has many common names and is often one of the most abundant species of snakes found in rivers and streams of...

Banded Water Snake

Nerodia fasciata

The Banded water snake (Nerodia fasciata) is a mostly aquatic, nonvenomous, colubrid snake native to the United States. The appearance of these snakes leads them to be frequently mistaken for other snakes with which they share a habitat, including...

Greenland shark

Somniosus microcephalus

The Greenland shark (Somniosus microcephalus), also known as the gurry shark or grey shark, is a large shark of the family Somniosidae ("sleeper sharks"), closely related to the Pacific and southern sleeper sharks. The Greenland shark is a...

South American Rattlesnake

Crotalus durissus

Crotalus durissus is a highly venomous pit viper species found in South America. It is the most widely distributed member of its genus. Currently, seven subspecies are recognized.

Smooth Snake

Coronella austriaca

The smooth snake (Coronella austriaca ) is a species of non-venomous snake in the family Colubridae. The species is found in northern and central Europe, but also as far east as northern Iran. The Reptile Database recognizes two subspecies as being...

Western Terrestrial Garter Snake

Thamnophis elegans

The western terrestrial garter snake (Thamnophis elegans ) is a western North American species of colubrid snake. At least five subspecies are currently recognized.

Agkistrodon piscivorus conanti

The Florida cottonmouth (Agkistrodon conanti) is a species of venomous snake, a pitviper in the subfamily Crotalinae of the family Viperidae. The species is endemic to the United States, where it occurs in southern Georgia and the Florida peninsula...

Florida banded water snake

Nerodia fasciata pictiventris

The Florida banded water snake (Nerodia fasciata pictiventris ), a subspecies of the banded water snake (southern water snake - Nerodia fasciata ), is a nonvenomous natricine colubrid native to the southeastern United States.

Meadow Viper

Vipera ursinii

Vipera ursinii is a venomous viper and a very rare species, that is in danger of extinction. This species is commonly called the meadow viper. It is found in France, Italy, and Greece as well as much of eastern Europe. Several subspecies are...

Tiger shark

Galeocerdo cuvier

The tiger shark (Galeocerdo cuvier) is a species of ground shark, and the only extant member of the genus Galeocerdo and family Galeocerdonidae. It is a large macropredator, with females capable of attaining a length of over 5 m (16 ft 5 in)....

Lataste's Viper

Vipera latastei

Vipera latastei is a species of venomous snake in the subfamily Viperinae of the family Viperidae. The species is endemic to the Iberian Peninsula and northwestern Maghreb. Three extant subspecies and one extinct subspecies are currently recognized,...

Wagler's Pit Viper

Tropidolaemus wagleri

The Tropidolaemus Wagleri, more commonly known as the Wagler's Pit Viper, is a species of venomous snake, a pitviper in the subfamily Crotalinae of the family Viperidae. The species is endemic to Southeast Asia. There are no subspecies that are...

Texas Garter Snake

Thamnophis sirtalis annectens

The Texas garter snake (Thamnophis sirtalis annectens ) is a subspecies of the common garter snake (T. sirtalis ) endemic to the United States.

Indonesian Pit Viper

Trimeresurus insularis

The Indonesian pit viper (Trimeresurus insularis) is a venomous pit viper species with a thin body and a prehensile tail. These snakes are distinguished by the presence of a heat-sensing pit organ located between the eye and the nostril on both...

Bamboo Pit Viper

Trimeresurus gramineus

Craspedocephalus gramineus, known as the bamboo pit viper, Indian green pit viper, or common green pit viper, is a venomous pit viper species found in the southern and north eastern parts of India.

Giant Garter Snake

Thamnophis gigas

The Giant garter snake (Thamnophis gigas ) is the largest species of garter snake. Relatively rare, it is a semi-aquatic venomous snake with a limited distribution in the wetlands of central California.

Basking shark

Cetorhinus maximus

The basking shark (Cetorhinus maximus) is the second-largest living shark and fish, after the whale shark. It is one of three plankton-eating shark species, along with the whale shark and megamouth shark. Typically, basking sharks reach 7.9 m (26...

Southern Pacific Rattlesnake

Crotalus helleri

The Southern Pacific rattlesnake (Crotalus helleri) is a pit viper species or subspecies that is known for its regional variety of dangerous venom types. It is sometimes considered a subspecies of the Northern Pacific rattlesnake (Crotalus oreganus).

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