Chinese crocodile lizard facts for kids
Quick facts for kids Chinese crocodile lizard |
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| At the Newport Aquarium in Newport, Kentucky | |
| Conservation status | |
Scientific classification  |
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Infraorder: | Paleoanguimorpha |
| Clade: | Shinisauria Vidal & Hedges, 2009 |
| Family: | Shinisauridae Ahl, 1930 |
| Genus: | Shinisaurus Ahl, 1930 |
| Species: |
S. crocodilurus
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| Binomial name | |
| Shinisaurus crocodilurus Ahl, 1930
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The Chinese crocodile lizard (Shinisaurus crocodilurus) is a special type of lizard. It lives partly in water and partly on land. You can find it in cool forests in southeastern China and northeastern Vietnam. This lizard spends a lot of time in shallow water. It also likes to rest on branches and plants near the water. There, it hunts for insects, snails, tadpoles, and worms.
This lizard is quite rare and not much is known about it. It is protected by international rules to control its trade. The Chinese crocodile lizard is the only living species in its group, called Shinisaurus. It is also the only living member of a larger group of lizards called Shinisauria. Fossils of its ancient relatives show they lived over 120 million years ago.
Contents
Discover the Chinese Crocodile Lizard's Features
What Does a Chinese Crocodile Lizard Look Like?
Chinese crocodile lizards are known for their green bodies. They often have reddish necks. You might also see light and dark patterns on their skin. Males are usually more colorful than females. Their colors become even brighter during the breeding season.
These lizards are typically about 40 to 46 centimeters (16 to 18 inches) long. One of their most unique features is the rows of bony scales on their back. They also have a strong, muscular tail. These features make them look a bit like a small crocodile. Males are generally larger and more colorful than females.
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Understanding Their Gut Health
Inside every animal, including the Chinese crocodile lizard, are tiny living things called microbiota. These are mostly helpful bacteria in their gut. These gut microbes are important for how the lizard digests food and stays healthy.
For an endangered animal like the Chinese crocodile lizard, studying these microbes is very important. It helps scientists understand what they eat and how their bodies use food. This knowledge can help protect them in the wild. Young lizards and adult lizards have similar gut microbes. Young lizards usually eat small insects like beetle larvae, spiders, and ants. Adult lizards eat what they can find. This includes earthworms, centipedes, and beetles. Female lizards especially like beetle larvae and earthworms when they are ready to have babies.
How Chinese Crocodile Lizards Behave
What Do Chinese Crocodile Lizards Eat?
In China, these lizards eat both small animals with backbones and those without. They are "sit-and-wait" predators. This means they sit quietly on branches near streams. They wait until they spot their prey. Their diet includes worms, spiders, and aquatic shrimp. They also eat tadpoles, small fish, and sometimes frogs or other lizards.
The Vietnamese subspecies prefers insects that live on land. These include cockroaches, crickets, and especially earthworms. They are not known to eat animals with backbones.
How Do They Protect Their Space?
Chinese crocodile lizards are territorial. This means they like to have their own space. Often, only one lizard will live in a certain pond or stream area. They show who is in charge by opening their mouths wide. This is called "gaping." How often a lizard gapes can show its place in the group.
They also swing their tails and lunge at other lizards. This is usually a warning, not a real fight. The dominant lizard might lunge and whip its tail gently. This rarely causes harm. The other lizard usually just leaves the area. Another way they show dominance is by doing "push-ups." They straighten their front legs and lift their heads. Sometimes, they even bob their heads in circles while doing this.
The Life Cycle of Chinese Crocodile Lizards
Chinese crocodile lizards are ready to have babies around age three. They are viviparous, which means they give birth to live young. Each spring, a mother lizard can have 2 to 12 fully developed babies. The babies grow inside the mother for up to nine months. Once born, the young lizards can live on their own. Female lizards can have babies every year. Courtship starts in late winter. Breeding usually happens in the summer, mostly in July and August.
During courtship, male lizards become more colorful. They perform special behaviors like head-nodding to attract females. Males and females mate to produce young. After mating, the male releases the female.
Where Chinese Crocodile Lizards Live
Surviving groups of Chinese crocodile lizards live in small, separate areas. These are mainly in the Guangxi and Guangdong provinces of southeastern China. The Vietnamese subspecies lives only on Yên Tử Mountain. This is in the Quảng Ninh and Bac Giang provinces of northeastern Vietnam.
These lizards live near clear streams in warm, wet forests. They prefer quiet streams in untouched areas. These areas include mountain ridges and dense forests. They live in a cool, rainy climate at medium-high elevations. This is usually 200 to 1,500 meters (650 to 4,900 feet) above sea level. They prefer less crowded places to avoid predators. Chinese crocodile lizards use tree holes, rocks, and plants for shelter. They are rarely seen on the forest floor.
Naming and Family Tree
How the Chinese Crocodile Lizard Got Its Name
The name Shinisaurus means "Shin's lizard." It honors a biologist named Sin Shu-szi. He was part of a team that first found this species. The second part of its name, crocodilurus, means "crocodile-tail." This refers to its unique tail.
Different Kinds of Chinese Crocodile Lizards
There are two recognized subspecies of the Chinese crocodile lizard:
- Shinisaurus crocodilurus crocodilurus (found in southeast China)
- Shinisaurus crocodilurus vietnamensis – the Vietnamese crocodile lizard (found in northeast Vietnam)
The Vietnamese subspecies was first noticed in 2003. It was officially named a new subspecies in 2016. This was because it had different habits, genes, and looks compared to the Chinese lizards. For example, the Vietnamese lizards prefer granite mountains with milder temperatures. They also perch on higher branches over wider streams. Their diet is mostly land insects. Their heads are slightly longer and more pointed.
Where They Fit in the Lizard Family
Scientists once thought Shinisaurus was related to another group of lizards called Xenosauridae. However, newer studies show it is more closely related to monitor lizards. It is also related to helodermatids, which are venomous lizards. But don't worry, the Chinese crocodile lizard itself is not venomous!
Shinisaurus is the only living member of the group Shinisauria. The oldest fossils of this group are over 120 million years old. These ancient relatives have been found in Asia, Europe, and North America. In 2026, scientists found a new fossil in France. They named it Acutodon villeveyracensis. This fossil is the oldest known relative of the Chinese crocodile lizard in Europe. It shows the group lived in Europe about 30 million years earlier than thought.
Protecting the Chinese Crocodile Lizard
How Many Are Left?
The number of Chinese crocodile lizards has dropped greatly. A study in 2008 estimated only 950 were left in China. They were split into eight small groups. The largest group had about 350 lizards. In 1978, there were an estimated 6,000 lizards. By 1990, it was about 2,500. This shows a huge decline of 70-90% in many areas. Some groups have even disappeared completely. The smallest groups might not survive because they lack genetic diversity.
In Vietnam, a 2013 study estimated about 60 adult lizards. By 2015, this number dropped to 41, even with new groups found. The decline in Vietnam is happening very quickly.
What Dangers Do They Face?
In 2014, the Chinese crocodile lizard was listed as an endangered species. This means it is at high risk of disappearing forever. Their groups are separated and need very specific habitats. This makes it hard for them to grow their numbers. Most lizards live outside protected areas.
A big threat is habitat loss. Logging, which is cutting down trees, harms Chinese populations. When broadleaf evergreen trees are removed, streams become unstable. This leads to floods and dry periods, which lizards cannot survive. Other threats include pollution from mining, small farms, and dams. Dam construction changes how water flows. Harmful fishing methods, like using electricity or poisons, also damage streams.
Another major threat is poaching. This is illegally catching animals. People catch these lizards for the pet trade, for meat, and for traditional medicine. Some believe they can cure insomnia. In Vietnam, similar threats exist, along with road building and coal mining. Local tourism also causes habitat loss and stream pollution. Climate change is also a concern. One study suggests that suitable forest habitats for the Chinese subspecies could disappear by 2080.
The species became popular in the international pet trade in the 1980s. Exports grew to hundreds each year. This led to a population decline. So, in 1990, the species was listed under CITES Appendix II. This controls international trade. Many lizards sold were likely caught illegally, even if sellers claimed they were bred in captivity. The number of traded animals sometimes even exceeded the estimated wild population. This suggests that collectors know about hidden groups of lizards. Their calm nature makes them easy to catch. Poaching is encouraged by the high prices dealers offer. Their striking looks attract reptile hobbyists. However, many captive lizards did not live long until more was known about their care. In 2017, the species was moved to CITES Appendix I. This means it is even more protected due to the ongoing threat of extinction from poaching and trade.
What Is Being Done to Help?
In China, lizards living in nature reserves are protected. Breeding programs have been set up in Daguishan and Luokeng nature reserves. The goal is to release these lizards back into other protected areas. The Daguishan program seems to have the only stable group in China. Even though the species has been protected by law since 1989, hunting and trading laws are often not enforced. Many zoos in Europe and North America have Chinese crocodile lizards. The Philadelphia Zoo and Zoo Dresden have large groups.
The Vietnamese subspecies lives entirely within protected areas. However, mining and tourism are not well controlled there. The Cologne Zoo has helped create brochures and posters. These aim to teach local people and government officials about the subspecies and its protection. Currently, Vietnamese law does not give the species special protection. But hunting animals in protected areas without a permit is illegal. Breeding programs for the Vietnamese subspecies are at the Me Linh Station for Biodiversity and Cologne Zoo. Scientists can use special tests on lizard scales. These tests help tell if a lizard was bred in captivity or caught from the wild. This helps stop illegal trade.
Images for kids
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Schönbrunn Zoo
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Wilhelma
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Cologne Zoo
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Leipzig Zoo
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