Grass Snake
Natrix natrix
A common, harmless European snake closely tied to wetlands and known for its distinctive yellow neck collar and bluffing defensive display.
- Venomous?
- Non-venomous
- Adult length
- 0.7-1.5 m (2.3-5 ft)
- Range
- Europe and western Asia
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Overview
The Grass Snake is one of the most widespread and familiar snakes in Europe, closely associated with ponds, rivers, and wetlands where it hunts amphibians. It is entirely harmless to humans and is best known for its dramatic defensive behaviors, including playing dead and releasing a foul-smelling musk.
It is a strong swimmer and one of the few European snake species so tightly linked to freshwater habitats.
How to identify it
- Olive-green, gray, or brown dorsal coloration with dark spotting or barring along the sides
- Distinctive pale yellow, orange, or cream collar behind the head, bordered by black
- Strongly keeled scales
- Round pupils
- Adults commonly reach 1-1.5 meters, with females larger than males
The bright neck collar bordered in black is the most reliable field mark distinguishing it from other European colubrids.
Habitat & range
Widespread across most of Europe and into western Asia, found in wetlands, ponds, rivers, damp meadows, gardens, and compost heaps. Strongly associated with freshwater habitats where amphibian prey is abundant.
Behavior, diet & reproduction
Diurnal and an excellent swimmer, often hunting in or near water. Feeds primarily on frogs, toads, and newts, and occasionally fish. When threatened, it may hiss, flatten its body, feign death (thanatosis), or release a foul-smelling secretion from its cloacal glands. Reproduction is egg-laying (oviparous), often using compost heaps or decaying vegetation as natural incubators, with clutches of 10-40 eggs.
Frequently asked questions
Is the Grass Snake venomous?
No, the Grass Snake is completely non-venomous and harmless to humans.
How does the Grass Snake defend itself?
It may hiss and flatten its body, but is best known for playing dead and releasing a foul-smelling musk when threatened.
Where does the Grass Snake live?
It is widespread across Europe and western Asia, especially near ponds, rivers, and wetlands.
What does the Grass Snake eat?
It feeds mainly on frogs, toads, and newts, and occasionally fish.
Grass Snake guides
In-depth guides for identifying and understanding Grass Snake.
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