What is the biggest turtle?

The largest turtle, the Galapagos elephant turtle.

Chinese name Galapagos Elephant Turtle Common Name Alias Galapagos Turtle English name Galapagos Turtle Latin name Geochelone nigra Geographical distribution The endangered CITES-I of "Diego Islands, Garaba" off the west coast of Ecuador breeds by laying eggs and eating grass. Biological and morphological characteristics of Galapagos tortoises larger than 100cm. Garaba's Gogo Islands are located in the Pacific Ocean, 0/000 km away from Ecuador/Kloc-in South America. 1535, a Panamanian ship went to Peru and accidentally discovered the Garaba Islands during its voyage. In the next 300 years, the Go Islands in Garaba have been a safe haven for ships until 1835, when Darwin came to the Galapagos Islands and stayed for five weeks, collecting and observing primitive species, verifying his evolutionary theory, and publishing Evolution and Natural Selection, which really made the Go Islands in Garaba widely known. The theory published by Darwin was also an extremely important source of information. "Galapagos" means "tortoise" in Spanish. There are not only rare and endemic birds, but also unique reptiles, such as endangered turtles and sea and land iguanas. The Galapagos Islands are volcanic islands in the sea and have never been connected with any land, so all animals and plants are born by native species. Although there are not many species of animals and plants on the island, most of them are unique species that have evolved. Almost all plants, reptiles and most land birds can only be seen in the Galapagos Islands. Garaba's Gogo Islands are composed of more than a dozen craters, and the elephant turtles distributed on the islands have evolved different appearances and habits, reaching as many as 14 subspecies. However, due to the early ships docked on the island, human beings arbitrarily caught elephant turtles to eat, and many subspecies were on the verge of extinction. Some elephant turtles on the island even miraculously appeared decades later, which greatly needed human protection. At present, only 12 subspecies remain. Among them, abingdoni, a subspecies of Pinta Island, was named Lonely George. At present, there is only one left, which is placed in the research center on Santa Cruz Island. Because Pinta Island is covered with dense shrubs, it is more difficult for researchers to find Pinta Island turtles, but they still get something. In the dense bushes, experts found abandoned nests and traces of elephants passing by. Therefore, many biologists believe that there are still Abidoni turtles on Pinta Island, and the government and researchers have invested a lot of money to find Pinta Island turtles. At present, there are only 12 subspecies left, all of which are distributed in Garaba Islands off the west coast of Ecuador. These large tortoises are similar in size to the Adabra Elephant Tortoise distributed in Cecil Islands, and their mature size can easily exceed 100cm. The weight of males can reach 260 ~ 320kg, and that of females is about 130 ~ 190kg. Even the mature body length of some subspecies can exceed 150cm, and the life expectancy can easily exceed 150 years. Garaba Gexiang turtles mostly avoid high temperature, move in the early hours of the morning, and also have the habit of migrating with the seasons, breeding period or rainy season, and often travel between coastal areas and mountainous areas. It may take 40 years for these turtles to reach the mature stage when they are young, and it may take 20 to 25 years in the wild and artificial breeding environment. All the turtles in Galapagos Islands courted in about1~ August, and the males would compete with each other for mating rights, because the females would only choose strong males to breed offspring, and the females would migrate from high altitude areas to coastal areas to breed offspring in order to lay eggs. The incubation conditions are ~ 28℃ ~ 29℃, the humidity is about 75% ~ 80%, and the incubation time is about 10. Garaba Gexiang turtle is a herbivore. The plants it often eats are leaves, fruits, weeds and cacti. The water source depends entirely on rain and cactus. Some elephant turtles live on dry islands and can even sleep for a year without eating or drinking in the dry season. 17 ~ 19 century, due to the cargo ships and fishing boats passing through the Galapagos islands, the number of tortoises on the island decreased sharply, and some subspecies even became extinct. Fortunately, the government planned a national park on the island to protect the habitat of these giant turtles, and the recession was alleviated. Now the biggest threat to these turtles comes from the outside. Quantitative estimation from the initial protection period 197 1 year to 2003 shows that there is no obvious increase. In the middle period, hoodensisephippium Darwinism; The four subspecies of Vandenberg turtle still have a downward trend, and only artificial breeding can stabilize the number of wild turtles. The number of wild elephant turtles has been declining since the first value. According to the survey, in most subspecies, the discovery rate of wild Garaba young turtles in the wild is "zero". Biologists who study elephant turtles have found that the main reason for the decline is that auxiliary mammals and cats migrating from the island prey on eggs or young turtles, which is also the main threat of elephant turtles, followed by poachers, because adult Garaba turtles have almost no natural enemies except humans. Galapagos tortoises are found in the subspecies classification of Galapagos tortoises, and the subspecies classification is as follows: G. n. abingdoni-Pinta Island (only "lonely George" old turtle is left) g. n. Becki- near Wolf Crater in northern Isabella Island (Isabella Island Tortoises). G.N. Chatham-san cristobal island (chatham islands Turtle) G.N. Darwin-Santiago (James Turtle) G.N. Effie Pim-Pingzong Turtle (Pingzong Turtle) G.N. Isabella Island (Isabella Turtle) in the Gunseri-Negra Mountains G.N. Hudson-Espanola Island (Open Turtle) G.N. Microleaf-Isabella Island near Darwin Crater (Isabella Island Turtle) G.N. Nigra-Isabella Island Turtle (extinct) G.N. Vandenberg Ji-Isabella Island Alcedo Crater (Isabella Island Turtle) G.N. Visina-Isabella Island South Cerro Azur Crater (Iguana Bay Turtle) G. Most of them live on land and weigh more than 300 kilograms. They mainly feed on vegetation and fallen fruits. Their sexual maturity takes about 25 years. The mating season is between January and June in the rainy season. When the dry season comes, females will lay 10-20 eggs the size of tennis balls and cover them with sand or mud. This process of digging holes, laying eggs and covering sand takes several hours of work. After 4-8 months, the baby turtles are hatched and try their best to spend the first dangerous year in their lives. Galapagos tortoise is the largest tortoise in existence. Endemic species of Galapagos Islands in Ecuador. Because the ecological environment of different islands in Galapagos Islands is obviously different, the morphology of different subspecies of elephant turtle is also different, which inspired Darwin's thinking about "independent evolution". Adult elephant turtles are 1.2 meters (3.9 feet) long and weigh up to 300 kilograms (660 pounds). Although it is not known how long its life span is, it is estimated that it can reach 200 years old. Each elephant turtle has a different shell shape. Because the livestock and mice brought by humans ate the baby elephant turtle, the number was greatly reduced. Galapagos tortoises are only distributed on 9 small islands in Galapagos Islands in South America. When Darwin first arrived in the Galapagos Islands, there were about 250,000 elephant turtles in the Galapagos Islands, but now there are only 1.5 million left. The main reason for the sharp decline in population is that whalers and pirates from 18 to 19 centuries often caught elephant turtles on board as food. The Galapagos Islands are now protected by the Ecuadorian government and listed as national parks and world natural heritage. The largest freshwater turtle, the real snapping turtle.

printing block

True Crocodile Tortoise True Crocodile Tortoise is mainly distributed near Louisiana, Arkansas, Tennessee, Kentucky, Missouri, Kansas, Oklahoma and Texas in the United States. Crocodile turtles can be found in most parts of Mississippi, southern Alabama, Georgia and the swamps of Florida.

catalogue

basic document

Introduction to carnivores

Predator value

Crocodile breeding

market prospect

Identification method

External physical characteristics

Living habits

Breeding mode

Basic data of feeding difficulty

Introduction to carnivores

Predator value

Crocodile breeding

market prospect

Identification method

External physical characteristics

Living habits

It is difficult to raise a real snapping turtle by breeding.

Edit the basic information of this paragraph.

Chinese name: real snapping turtle English name: snapping turtle commonly known as alias: big snapping turtle, snapping turtle, snapping turtle. Latin scientific name: Macroclemys temmincki. Distribution: Habit: Crocodile turtles live in rivers, lakes, ponds and swamps and feed on fish, waterfowl, snails, shrimps and water snakes. Crocodile turtles have outstanding predation ability. Whenever it finds a small animal drinking water by the water, it will suddenly swing its tail, stun its prey and drag it into the water to enjoy it slowly. Crocodile turtles rarely move on land. Only in the breeding season will females climb to the shore and choose a suitable place to lay their eggs. Can produce 30- 120 eggs at a time. After about 100 days, the young turtles can hatch. The growth rate of young turtles is amazing, and they can grow to 2 kilograms a year. Three years later, the baby turtle began to mature sexually. Crocodile turtles were killed by humans, and now they are very rare in the wild, ranking sixth among the top ten endangered and rare wild animals in the world published by the World Wildlife Federation report. Features: The true crocodile turtle looks like a crocodile, which is a combination of turtle and crocodile, so it is called true crocodile turtle. Its head is so thick that it can't be completely retracted into the shell. This is a real crocodile turtle.

The neck is short and thick, with brown spines on the back of the neck, small eyes, a small jaw on the mouth, a snout, a long tail, edges on both sides, sharp spines on the edges, and scales and ridges on the first two thirds of the back of the tail, which are serrated. The dorsal shell is thin, and the epithelium is mainly brown, occasionally brown. There are three fuzzy edges with radial stripes on the back and teeth on the back edge. Size: snapping turtles are huge. Adult tortoiseshell is 0.4-0.7m long and weighs 45-75kg. The largest can reach 200 kilograms, with a body length of 0.75-0.9 meters. Breeding mode: oviparous. Crocodile turtles reach adulthood after 1 1- 13 years. The male turtle is bigger than the female turtle (as opposed to other turtles). Female turtles lay eggs in April-June, with 0/6-50 per nest. The eggshell is hard, the hatched larvae are about 1.7 inches, and the tail is longer than the body. Feeding habits: Crocodile turtles mainly eat live food that automatically swims into their upper and lower beaks. But crocodiles also eat any meat, such as fish, beef, chicken and commercial turtle feed. Clear and warm water should be provided for snapping turtles. The largest turtle leatherback turtle.

printing block

Leatherback turtle, also known as leatherback turtle, lays eggs on the beach. It is the largest turtle among turtles, with a maximum body length of 3 meters and a shell length of more than 2 meters. The weight can reach 800-900 Jin. Leatherback turtles are mainly distributed in tropical Pacific Ocean, Atlantic Ocean and Indian Ocean, and occasionally found in temperate waters. It is distributed in tropical to temperate waters, and reaches the coastal areas of Siberia, South China Sea, East China Sea, Yellow Sea, Hainan Coast and Taiwan Province Province in the north, mostly inhabiting the upper and middle tropical waters, and sometimes entering the offshore and harbor. According to the turtle investigation report published by Duke University's research team, it is likely to become extinct in the next 10-20 years.

Chinese name: leatherback turtle

Nickname: leather turtle

Name: Gram-negative bacteria

Field: animal kingdom

Phylum: Chordata phylum

Class: Reptiles

Target: tortoise.

Suborder: tortoise.

Family: leatherback turtle family

Genus: leatherback turtle

Species: leatherback turtle

Distribution: tropical and subtropical warm waters in the world.

catalogue

Biological label

morphological character

Living habits

distribution range

Reproductive habit

Risk factors and current situation

Endangered information

protection measures

related data

Protection grade biological label

morphological character

Living habits

distribution range

Reproductive habit

Risk factors and current situation

Endangered information

protection measures

Expand the relevant data protection level and edit the biological label of this paragraph.

Species name: leatherback turtle common name alias: leatherback turtle, leatherback turtle, seven leatherback turtle, sampan turtle and swallow turtle Latin scientific name: Dermochelys coriacea scientific name: Vandelli English name: leatherback family and genus classification: reptile-tortoise-endangered information: CITES endangered level: Appendix I Effective year:1999. 6-year IUCN Endangered Grade: CR A 1abd Effective Year: 2003 State Key Protection Grade: Secondary Effective Year: 1989 China Red Book of Endangered Animals Grade: Critical Effective Year: 1996.

Edit the morphological characteristics of this paragraph

Leatherback turtle is the largest turtle in the world, which can be called "giant turtle". Leatherback turtle

Its head, limbs and body are covered with smooth leather skin, and there is no horny shield. The bony shell of the crustacean is inlaid with hundreds of small irregular polygonal bone plates, of which the largest bone plate forms seven regular longitudinal ridges, hence its name, and some people call it leather turtle. These longitudinal edges extend into pointed buttocks at the rear end of the body, and the two longitudinal edges on the side of the body form irregular nail edges. There is no small bone plate embedded in the bone shell of the abdominal nail, which is composed of many small bones firmly embedded in dense tissue, and the central row is split where the umbilical cord passes. Its mouth is hooked and its head is too big to be retracted into the shell. The limbs are paddle-shaped and claw-free, and the phalanges of the forelimbs are particularly long. The back of the adult turtle is dark brown or black, decorated with yellow or white spots, and the abdomen is gray. The scales on the top of leatherback turtle head are complex and irregular. The bone shell of the carapace is inlaid with polygonal bone plates of different sizes, with 7 regular longitudinal edges. There are five longitudinal edges on the ventral surface. The whole skeleton shell is covered with smooth cortex. There are two large triangular tooth protrusions on the upper jaw. The limbs are paddle-shaped, the forelimbs are particularly developed, and the hind limbs are short. The tail is very short. The back is dark brown with light yellow spots, and the ventral side is lighter in color.

Edit the living habits of this paragraph.

Leatherback turtle is a kind of pelagic animal, mainly inhabiting the middle and upper layers of tropical waters, and occasionally found in offshore and harbor areas. Because leatherback turtles

The limbs are huge and paddle-shaped, and they can swim quickly in the ocean for a long time, so they are called "swimmers". 1970, a leatherback turtle was caught in the waters of the Yangtze River estuary in China, but the marks on its body showed that it was caught in the Atlantic waters of Britain thousands of miles away, showing its high swimming ability. Mainly fish, shrimp, crab, squid, snail, clam, starfish, sea cucumber, jellyfish and seaweed, and even jellyfish with poisonous stinging cells. There are no teeth in its mouth, but there are big and sharp horny thorns on the inner wall of esophagus, which can grind food and then enter the gastrointestinal tract for digestion and absorption. Strangely, although it belongs to a temperature-changing reptile, leatherback turtles from the tropics to the North Pole can maintain a body temperature of 25℃ in 7℃ water. Because although its basal metabolic rate is much lower than that of mammals, its thermal insulation volume effect helps to maintain enough heat. If it is in a warm climate, it will increase the blood flow to the limbs, thus greatly increasing its heat loss, that is, a lot of heat dissipation. Leatherback turtles feed on small fish, crustaceans, mollusks and seaweed. Leatherback turtles have poor eyesight. Therefore, they often eat plastic bags or other garbage floating on the sea surface as jellyfish, causing intestinal obstruction and causing a large number of leatherback turtles to die from white garbage made by humans. In addition, fishermen's fishing nets and fast-moving ships at sea will also threaten the life of leatherback turtles. Coupled with overfishing, the number of leatherback turtles is decreasing. Leatherback turtles are mainly distributed in tropical and subtropical warm waters in the world, and their breeding grounds are basically between 30 north latitude and 20 south latitude. Occasionally, individuals looking for bait can follow the current north to Iceland near 70 north latitude and south to Uruguay at 35 south latitude. In China, it is distributed in Guangdong, Fujian, Zhejiang, Jiangsu, Shandong, Liaoning, Taiwan Province and Hainan near the East China Sea and the South China Sea, and in the waters of the Yangtze River estuary in Shanghai. May-June is the main spawning season of leatherback turtles every year, and females need to climb from the ocean to the beach to dig holes to lay eggs. Oviposition is usually carried out at night, and the action is very cautious. If you encounter external interference, you will return to the ocean immediately. Dig a pit on the beach before spawning, and lay 90- 150 eggs each time. During the breeding period, you can lay eggs many times. After laying eggs, they are covered with sand and hatch at natural temperature. However, more than 10 eggs in each nest often fail to hatch successfully. The newly hatched larvae are about 5.8-6 cm long and instinctively climb to the sea immediately.