Barred Grass Snake

Fascinating facts about the Barred Grass Snake

• Until August 2017 the barred grass snake was grouped with the common grass snake, Natrix natrix. Genetic analysis then split it, recognising Natrix helvetica as a distinct species. The reclassification created a separate taxon that now includes five recognised subspecies across its western European range. This change reflects the distinct genetic lineage that separates it from its former conspecifics.
• When threatened it releases a garlic-smelling fluid from its anal glands and may feign death by going completely limp. It can also force blood from its mouth and nose, adding a startling visual deterrent. In addition, the snake may hiss and strike without opening its mouth, rarely biting, and often regurgitates the contents of its stomach if captured. These combined actions form a multi-layered defence.
• If alarmed the snake lifts the front of its body and flattens its head and neck to imitate a cobra's hood. This rare defensive behaviour is described for the barred grass snake and is not reported for the species in Britain. The mimicry likely evolved to deter predators that recognise cobra postures, adding a visual bluff to the snake's other defences. It is an unusual example of behavioural mimicry among European reptiles.
• Barred grass snakes lay their leathery eggs in midsummer, typically between June and July, and each clutch contains between eight and forty eggs. The embryos develop over roughly ten weeks, but successful hatching only occurs when the nest stays warm and moist. A minimum temperature of 21 °C is required, with an optimum around 28 °C, and the site must retain high humidity.
• In the cooler northern parts of its range, the barred grass snake begins hibernation as soon as temperatures start to fall in October. It then remains dormant through the coldest months, often not emerging until April when the weather warms again. To survive the winter the snake either finds a sheltered spot that shields it from harsh conditions or digs underground, where the temperature stays relatively stable.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Barred Grass Snake

As the Barred Grass Snake slithers through the damp undergrowth, its sleek, serpentine form weaves effortlessly between the tall blades of grass, its scaly body glistening with dew-kissed droplets that reflect the dappled sunlight filtering through the vegetation. With a sinuous, almost languid motion, it navigates its aquatic domain, a master of stealth and patience, lying in wait for unsuspecting prey to wander into its realm. In this serene and tranquil world, the Barred Grass Snake reigns supreme, its remarkable adaptability and cunning ensuring its survival in a delicate balance of power and fragility.

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