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  you are in: ANIMALS > SNAKES > GRASS SNAKE



Grass snake
Natrix natrix  

   Fact File
Grass snakes (by Barry Kemp, Jules Howard & Tony Wharton)
Range:
  • Grass snakes are usually 15-100cm.
  • Usually a shade of green, grey or brown, with a cream, yellow or light green belly .
  • Distinctive yellow and black collar behind the head; dark bars/spots along the sides and sometimes the back; dark patterns on the belly which are unique to the individual.
  • Circular pupil.
  • Common but are thought to be declining.
  • Protected by law from deliberate killing, injury and trade/sale.
Photos (clockwise from top right): Barry Kemp, Jules Howard/Froglife, Tony Wharton 

Grass snakes are found throughout England and Wales but are absent from Scotland. They’re quite often seen in gardens, especially those with ponds which the snakes can hunt in. Grass snakes are quite timid, often feigning death if disturbed; alternatively they may excrete a foul-smelling liquid. They are our longest native snake and can reach 150cm.

A year in the life...  

Spring Adults emerge during March/April, with males appearing before females. Mating takes place in April.
Summer Grass snakes are the UK’s only egg-laying snake. Eggs are laid in June/July in rotting vegetation (including garden compost heaps), which acts as an incubator. The eggs hatch in late summer – the pencil-sized juveniles (around 15cm long) look exactly like miniature versions of the adults.
Autumn The rest of the year is spent preparing for winter; grass snakes primarily hunt for amphibians or fish in ponds, canals and reservoirs (though they do not eat large meals very often).
Winter The snakes hibernate between November and March.


Primary threats

Loss of habitats.

More on...
O Snakes in the Grass.
O Frequently asked questions about snakes.
O Check out our grass snake gallery on Facebook.