Snapping turtles' habits

Chinese name is Snapping Turtle, Latin name is Chelydra serpentina, English name is American Snapping Turtle, alias is Crocodile turtle, small crocodile turtle, meat turtle, American snake turtle. It belongs to the Snapping Turtle Family and Snapping Turtle.
The Snapping Turtle is geographically distributed in the United States and was introduced in 1997 in China. At present, there are a small number of farmers breeding in East China and South China. No report of artificial reproduction has yet been seen. Snapping turtles have a simple feeding environment, strong adaptability to temperature, and no cold in winter. They can hibernate naturally and are not afraid of heat in summer. They also have strong disease resistance and fast growth speed.
External Morphological Features Snapping Turtles are unusual in appearance, large in size, and have 47 cm of carapace length. Its head is triangular in shape, with a gray-brown top, scattered with small black spots, and several small projections. The head cannot be completely reduced in the shell. The turtle's mouth crack is large, reaching the back of the eyes, the neck is long, pale yellow. The carapace is short and wide, almost the same in length and width. The adult carapace is tan (black larvae). Each scutellum has a protruding spine and forms radial stripes from the apex of the spine to the left, right and front. The back of the carapace is serrated. Adult plastron is pale yellow or white (larvae black), plastron is small, limbs can not shrink in the shell, hypertrophy and thick, irregular distribution of the epidermis small pods, abdominal large scales, powerful between the toes, fingers The claws and rich clams. The tail length is half the length of the armor. The tail is covered with a ring-shaped scale and the back forms a spine, which resembles the tail of a crocodile.
Living habits in the wild, Snapping turtles are aquatic turtles, living in fresh water, such as lakes, rivers, marshes and pools, but also living in salty low salt water, such as the Bay, Bay of Estuary. Hi in the water in the sand, shrubs, weeds. When the snapping turtle floats in the water, it is not easy to be found with its protective color on the back - like a piece of rotten wood floating in the water. It often sticks its nose out of the water, and its head does not fully extend. Snapping Turtles like to be in the water during the day, lying on the wood or stones, and sometimes floating on the water. Sometimes they have four legs facing up and their backs are facing downwards. Their heads turn upwards to expose the water. The turtle began to crawl at night. The snapping turtle was not afraid of the cold and was not afraid of the heat. Normal temperature above 18 °C for food, 20 ~ 33 °C is the best activity, feeding temperature, less than 34 °C, and volatility in the bottom and the summer in the sand, 15 ~ 17 °C Fashion can be a small amount of activity, some turtles can Foraging, hibernation below 15°C, hibernation below 10°C.
The Snapping Turtle is the most ferocious of the turtles. Adult snapping turtles are aggressive and can attack people actively. 20-40 grams of larvae are gentle and do not take the initiative to injure others. When someone or something walks in front of the turtle and shakes, the turtle first shrinks his head into the shell, waits for a timely opportunity, suddenly sticks his head to bite, and then shrinks his head back into the shell, and so repeatedly. When the turtle is picked up, the body of the turtle releases a scent that is the same as the musk that is released by the Mexican musk turtle (Staurotypus triporcatus). Snapping Turtle has a relatively small plastron, only 50%-60% of the carapace. Therefore, the snapper's limbs have well-developed thighs and long limbs. The strong claws of the current limb climb over the object, and the hind legs and tail support the ground. Turtles can stand upright. When crawling, the four limbs will support themselves, and the stepping distance is large and the speed is fast.
Edible snapping turtles are omnivorous, such as wild fruits, plant stems and leaves, shrimp, small crabs, small fish, clams, snails, clams, otters, small frogs, clams, clams, freshwater parasites, small mammals, and various All kinds of algae. Under artificial rearing conditions, fish, pork, beef and poultry are viscera, and plants eat apples and leaves. Female and male identification.
Male turtles are larger in size and have longer tails. Their length is 86% of the length of the plastrons, and the cloaca foramen is located in the posterior margin of the carapace; female turtles are short and the length of the turtle tail is less than 86% of the length of the plastron. .
The mating season for breeding snapping turtles is from April to September every year. The male turtle often climbs to the back of the female turtle. At first, the female turtle crawls. After the male turtle slides down, it catches up and climbs again. It repeats until the female turtle stops. Creeping. The male turtle has a hind leg and the front paw hooks the female's carapace. During the process of mating, the male turtle's head and neck are straightened and shaken from side to side. Sometimes the nostrils of the two turtles face the nostrils and face each other. The period of spawning is from May to November each year, and June is the peak period of spawning. The female turtle climbs to the shore and looks for open land, usually about 200 meters from the water's edge. The caves dug by turtles are large in caverns, small in caverns, and have a certain degree of curvature. They are 10 to 13 centimeters deep. The size of the cavern varies according to the shape of the turtle. There are 11 to 83 eggs per litter, usually 20 to 30 eggs. Large females spawn more eggs. Eggs are white, spherical, slightly rough appearance, diameter of 23 to 33 mm, egg weight 7 to 15 grams. After hatching for 55-125 days, the hatchling hatched. The incubation environment varies and the number of days of incubation varies. When the incubation temperature is above 30°C and below 20°C, the hatchlings are females; when the incubation temperature is between 22°C and 28°C, the hatchlings are male. The juvenile turtle weighs 9.5 to 12 grams, the carapace length is 24 to 31 millimeters, and the carapace is slightly rounded and black. Each scutellum has projections. The back of the carapace is serrated.

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