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Hydrodynastes gigas is a New World species of large, rear-fanged, Dipsadin snake endemic to South America. It is commonly and alternatively known as the false water cobra and the Brazilian smooth snake. [3] The false water cobra is so named because when the snake is threatened it "hoods" as a true cobra (Naja species) does. Unlike a true cobra ...
The eastern coral snake or American cobra (Micrurus fulvius), which also does not rear upwards and produce a hood when threatened [4]: p.30 The false water cobra (Hydrodynastes gigas) is the only "cobra" species that is not a member of the Elapidae. It does not rear upwards, produces only a slight flattening of the neck when threatened, and is ...
The World's 100 most threatened species [1] is a compilation of the most threatened animals, plants, and fungi in the world. It was the result of a collaboration between over 8,000 scientists from the International Union for Conservation of Nature Species Survival Commission (IUCN SSC), along with the Zoological Society of London . [ 2 ]
The most important factors in the difference of mortality rates among victims envenomated by cobras is the severity of the bite and which cobra species caused the envenomation. The Caspian cobra (N. oxiana) and the Philippine cobra (N. philippinensis) are the two cobra species with the most toxic venom based on LD 50 studies on mice.
The Philippine cobra (Naja philippinensis) is one of the most venomous cobra species in the world based on murine LD 50 studies. The average subcutaneous LD 50 for this species is 0.20 mg/kg. [34] The lowest LD 50 reported value for this snake is 0.14 mg/kg SC, while the highest is 0.48 mg/kg SC.
The forest cobra is Africa's largest cobra of the genus Naja [8] and possibly the largest of all the true cobra (Naja) species in the world. [7] [19] The length of an average adult is 1.4 to 2.2 m (4.6 to 7.2 ft), and they regularly attain lengths of 2.7 m (8.9 ft), [8] [20] and lengths up to 3.2 m (10 ft) have been recorded in the wild.
Cobras, mambas, and taipans are mid- to large sized snakes which can reach 2 m (6 ft 7 in) or above. The king cobra is the world's longest venomous snake with a maximum length of 5.85 m (19.2 ft) and an average mass of 6 kg (13 lb). [7]
The monocled cobra has an O-shaped, or monocellate hood pattern, unlike that of the Indian cobra, which has the "spectacle" pattern (two circular ocelli connected by a curved line) on the rear of its hood. The elongated nuchal ribs enable a cobra to expand the anterior of the neck into a “hood”.