Grass Snake: Species seen in parts of County Durham

The grass snake, the UK’s longest native reptile, is typically associated with southern and central England and parts of Wales.

However, recent anecdotal evidence and scattered public reports suggest the species may be making a quiet comeback in parts of the North East.

Sightings have been reported near wetlands, large gardens and compost-rich areas, habitats that are ideal for the elusive snake.

“It’s both exciting and unexpected,” said one local naturalist.

“For years, grass snakes were thought to be locally extinct here, but we’re now hearing more frequent, though still unconfirmed, reports, particularly around water-rich environments.”

Once widespread across Britain, grass snake populations in the North East declined sharply over recent decades due to habitat loss, climate change and increasing urban development.

Until recently, many conservationists believed the species had vanished entirely from County Durham.

Unlike the UK’s only venomous snake, the adder, grass snakes are completely harmless to humans.

Grass snake (Image: UGC)

They are recognisable by their olive-green colouring and distinctive yellow-and-black collar behind the head, and can grow up to 1.5 metres in length.

They are also strong swimmers, the only native UK snake regularly found hunting in water.

“Grass snakes are closely tied to wetlands,” explained BBC Countryfile on its website.

“They primarily feed on amphibians such as frogs and newts, but will also take small fish and occasionally mammals.”

Despite their rarity, experts say suitable habitats still exist in County Durham, particularly in areas such as the Wear Valley, Teesdale and parts of the Derwent Valley.

The species typically emerges from hibernation in spring when temperatures rise above 10°C. Breeding soon follows, with females laying eggs in warm, decomposing material such as compost heaps in early summer.

Hatchlings usually emerge between late August and September.

Wildlife organisations are now encouraging the public to report any sightings, while stressing the importance of not disturbing the animals.

“If grass snakes are genuinely returning to the North East, it’s a very positive sign,” said a spokesperson for Durham Wildlife Trust.

“It suggests that, in some places, our landscapes are recovering and can once again support species that were previously lost.”