As Northern water snakes age, the color darkens, and the pattern becomes obscure. The common name, Russian rat snake, is misleading as only a small portion of the geographic range of E. schrenckii is in Russia. "Manchurian Black Water Snake" in World Heritage Encyclopedia. These snakes can be brown, gray, reddish, or brownish-black in color. It is often found in wetlands, but also found in a wide variety of mainly moist environments such as scrub land, farmland, river banks, swamp land, gardens, stones, log piles, forests, and up in trees. Per known studies of this species in the wild, adult females can weigh between 158.9 and 408 g (5 ⁄2 and 14 ⁄2 oz) in average body mass while the smaller male can average from 80.8 to 151 g (2 ⁄8 to 5 ⁄8 oz). It varies greatly in colouration, from creme saddles to dark brown saddles. It is among the largest and most robust of all the rat snake species. It is an officially protected species in Russia and South Korea. They have dark crossbands on the neck and dark blotches on the rest of the body. (Ji Daming e.a., 1985). They may retain their eggs for a time, as they may deposit them in a well-advanced state.

Many captive bred specimens have been line bred to produce clean yellow saddles. These aquatic creatures eat mostly crayfish, but will also consume water bugs, fish and tadpoles. Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). [4] It has been reported from Chinese provinces of Jilin, Heilongjian, and the Quingyuan area of Liaoning. E. schrenckii feeds primarily on small mammals, birds, and bird eggs. The pupils in their eyes are round.Females are heavier and longer than males, and grow muc… The Northern water snake is a large, nonvenomous, common snake native to North America. Eggs usually hatch within 40 days. The difference is most notable when comparing the heads of both snakes. The largest females can weigh up to 560 g (20 oz) while the largest males can scale 370 g (13 oz). Elaphe schrenckii is a species of nonvenomous snake in the family Colubridae. [6], As one common name, Manchurian black water snake, suggests, this species inhabits fairly moist biotopes such as forest clearings, scrub, farmland, hiding amongst cavities in trees, piles of stone or wood, and when threatened can flee up a tree or into the water. The northern, darker, is the most common variety. [3], Endemic to Northeast Asia, E. schrenckii is found in China, Korea, Mongolia, and Russia. The species is indigenous to Northeast Asia.

It occurs in Russia and China, to the east to Chabarowsk in the Amur region, west to the Chingan mountains, and north to Manchuria (Northeastern China). [2], The species E. schrenckii has not been assessed by the IUCN but is on the China Species Red List with a classification of "Vulnerable VU A2a". This species has 200-236 ventral scales, 55-78 subcaudal scales, and 21-23 rows of dorsal scales. This snake is believed to be mostly crepuscular (active only at dawn and dusk). [citation needed]. E. schrenckii is very similar to the Korean rat snake, E. anomala, which was once thought to be a subspecies of E. schrenckii and was classified as E. schrenckii anomala. The body of this young, venomous Water Moccasin is very thick for its length, and has a relatively short, thick tail. Water snake scales are keeled; they have a raised ridge down the center, making them rough to the touch. The northern watersnake may be confused with the gray ratsnake, eastern foxsnake, milksnake, eastern hog-nosed snake, eastern massasauga and Lake Erie watersnake. This species occurs up to 2,000 m (6,600 ft) altitude and can live in cooler areas than many other snakes. Notice that the head is also thick and blocky. The common watersnake can grow up to 135 cm (4 ft 5 in) in total length (including tail). A harmless snake the same length would be much more slender and would have a much longer, thinner tail (see below). [citation needed]. E. schrencki has been noted up to 6 m (20 ft) high in trees. Queen snakes have a reddish belly with two rows of dark spots running its length. The markings and coloration of water snakes vary somewhat from species to species, but for the most part they are brown, gray, olive green or reddish with dark splotches or bands on their backs. Per one study, average total length of females was 81.4 cm (2 ft 8 in) while that of males was 69.6 cm (2 ft 3 ⁄2 in). As a pit viper, the water moccasin has the distinctive, wide-jawed, wedge-shaped head, and water snakes do not. Zoological Society of London, Regent’s Park, London, NW1 4RY, 2006, https://en.wikipedia.org/w/index.php?title=Elaphe_schrenckii&oldid=945030820, Articles with unsourced statements from July 2019, Creative Commons Attribution-ShareAlike License, This page was last edited on 11 March 2020, at 11:58. However, the snakes which were hardier than expected bred, and the species is now gradually increasing its range. Common names for E. schrenckii include Amur rat snake, Manchurian black racer, Manchurian black water snake, Russian rat snake, Schrenck's rat snake, and Siberian rat snake. Adult females of E. schrenckii lay from 6 to 30 eggs in June or July.

The Manchurian black water snake is an excellent swimmer (hence one common name) and is a very good climber, as it is semi-arboreal. Sometimes they look solid brown or black when wet. Elaphe schrenckii is a species of nonvenomous snake in the family Colubridae. The gray ratsnake is black with faint blotches, whereas the northern watersnake is dark brown with faint banding. Water moccasins thrive in the southeastern parts of the U.S. but often get confused with non-poisonous water snakes. The specific name, schrenckii, is in honor of zoologist Leopold von Schrenck.

[7], E. schrenckii can reach a total length (including tail) of 1.4–1.8 m (4.6–5.9 ft). Reportedly, pet snakes were released into the wild by someone who did not expect that they would survive the winter. This relatively small snake grows to be 1 to 2 feet long and has a dark gray, black, brown or olive body with a single white to yellow stripe on its underside. [5], In the Netherlands the species occurs as an introduced exotic around Groningen airport near Eelde, where it was first seen in the mid nineteen nineties. The species is indigenous to Northeast Asia. Mongolian Red List of Reptiles and Amphibians.

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