Grass snake

The grass snake is a long animal.

It has a yellow ring on its neck. It can be green or brown. This snake likes to swim in fresh water. It hunts for food near the water. It mostly eats frogs and toads.

The snake uses its smell to find food. It also uses its eyes to see. When it grows, it sheds its old skin. It is a very interesting animal to watch.

The grass snake is a snake found in Europe and Africa.

It is often green or brown. It has a yellow or white collar behind its head. This makes it look like it is wearing a ring. Some snakes are darker in cold places. This helps them soak up heat from the sun.

These snakes love to swim in fresh water. They hunt near the edges of ponds. They use their eyes and smell to find food. They mostly eat frogs and toads.

They swallow their prey whole. They do not squeeze it first.

As the snake grows, it must shed its skin. This is called ecdysis. New skin grows under the old skin. The eyes may look blue or milky during this time. The snake cannot see well then. It will not hunt until the old skin falls off. To stay safe, grass snakes can act dead. They can also make a fluid that smells like garlic. This helps scare away animals that might eat them.

The grass snake is a fascinating creature found in many places.

It is a non-venomous snake that lives in parts of Europe and Africa. You might see them near fresh water like ponds or rivers. These snakes are often dark green or brown in color. They have a bright yellow or white collar behind their heads. This special mark is why some people call them ringed snakes.

In colder areas, these snakes are often darker in color. This helps them soak up more heat from the sun.

Grass snakes have a very specific way they find food. They are strong swimmers that like to hunt near water edges. They use their sight and a sense of smell to find prey. They mostly eat amphibians like common frogs and common toads.

When they find a meal, they swallow it whole. They do not use constriction, which is when a snake squeezes its prey. After a big meal, the snake might stay in one spot. It will bask in the sun to help digest its food. This can take a long time because the prey is often large.

Scientists have studied these snakes for a very long time. We have found fossils of grass snakes from the Early Pleistocene era. These old bones were found at a site called Somssich Hill 2 in Hungary.

People have also written about them in ancient books. A writer named Virgil described them in his work called Georgics in 29 BC. He said they lived in marshes and ate frogs and fish. These records show that people have noticed these snakes for thousands of years.

There are many different types and facts about these snakes. The grass snake can grow to be quite long. They lay batches of 8 to 40 leathery eggs between June and July. These eggs need warmth and moisture to hatch after about 10 weeks.

Some subspecies are very rare and are called critically endangered. For example, the Sardinian grass snake is in danger of disappearing. In Denmark, all five species of reptiles have been protected since 1981.

Grass snakes are even part of famous old stories. In Baltic mythology, they are seen as sacred animals.

People in Lithuania and Latvia sometimes kept them as pets near their homes. They believed that a snake living under a house kept it safe. Some legends say that grass snakes even wear golden crowns. These stories show how much people have wondered about these animals. Today, many people still see them as symbols of wisdom and luck.

The grass snake, known scientifically as *Natrix natrix*, is a non-venomous colubrid snake. It is a semi-aquatic species, meaning it spends much of its time near water. These snakes are widely distributed across mainland Europe, from mid-Scandinavia to southern Italy. They also inhabit parts of the Middle East and northwestern Africa. Because they are often found near fresh water, they are frequently associated with ponds and rivers.

Physically, the grass snake is easy to identify by its distinctive markings. It is typically dark green or brown, but its color can range from grey to black. In colder regions, darker pigmentation is more common. This darkness likely provides thermal benefits by helping the snake absorb more heat. A key feature is the yellow or white collar located behind the head. This mark is why the animal is sometimes called a "ringed snake." The underside is white with irregular black markings, which helps people identify them in the field.

The grass snake follows a specific biological process to grow and survive. As the snake grows, it must undergo ecdysis, which is the process of shedding its skin. During this time, a new skin forms underneath the old one. The eye scales may turn a milky blue or white color. This stage is known as being "in blue," caused by an oily secretion between the layers. While in blue, the snake's eyesight is impaired. Consequently, they do not hunt or move much during this period. Eventually, the old skin sloughs off in one piece, and normal activity resumes.

Feeding and movement are closely linked to the snake's digestion. Grass snakes primarily prey on amphibians, such as the common frog and common toad. They may also occasionally eat larvae or ants. To find food, they use sight and their sense of smell via the Jacobson's organ. Unlike many other snakes, they do not use constriction to kill prey. Instead, they consume their prey live. Because their meals are often large relative to their body size, movement is impaired after eating. A snake that has recently eaten will stay in one location to bask. This basking helps optimize their body temperature to digest the meal efficiently.

Reproduction for the grass snake occurs in a series of seasonal stages. In the spring, males emerge first to bask and raise their body temperature. This helps increase their metabolism and may maximize sperm production. By April, or when temperatures are favorable, males mate with females. Between June and July, females lay batches of 8 to 40 leathery eggs. These eggs require a temperature of at least 20°C and high humidity to hatch. They are often laid in areas like compost heaps where rotting vegetation provides warmth. After about 10 weeks, the young hatch and are immediately independent.

History and classification have changed as scientists learn more about these reptiles. Fossils of *Natrix natrix* have been found in southern Hungary, dating back to the late Early Pleistocene. Recent genetic analysis has also led to new classifications. In August 2017, what was once considered a subspecies was recognized as a separate species, *Natrix helvetica*, or the barred grass snake. Other subspecies, such as *N. n. astreptophora*, have also been reclassified as their own species. Some subspecies, including the Sardinian grass snake, are now considered critically endangered.

Grass snakes also hold a deep place in human culture and mythology. In Baltic mythology, the grass snake is a sacred animal known as the *žaltys*. In Lithuania and Latvia, these snakes were historically kept as pets near the hearth. Many folk beliefs suggested that a snake living under a house protected it from fire. Even today, the grass snake remains a symbol of wisdom and education in these regions.

When threatened, the grass snake uses several unique defense mechanisms. They can produce a garlic-smelling fluid from their anal glands. They may also perform thanatosis, which is the act of feigning death by becoming limp. In some cases, they may even practice autohaemorrhage, secreting blood from the mouth and nose. They can also display aggression by hissing or striking without opening their mouths. Interestingly, they may raise their front bodies and flatten their necks to mimic cobras. This behavior may be a fossil trait from when the extinct European cobra lived in the same regions.