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Grass Snakes and Ponds

Grass Snakes and Ponds

Grass Snakes, Latin name (Natrix Natrix), are the U Ks largest snake and are a protected species under the UK conservation ac.  Also known as Ringed Snakes and Water Snakes, these snakes are non-venomous and therefore, no threat to us humans.  Grass Snakes are very different in appearance to our British venomous Adders (which are shorter in length and have a cream-colored zigzag that runs down their backs with a cream/pale yellow colored V on their necks.) Grass Snakes are dark green or brown with black spotted scales with a yellow collar.  They are much larger and slimmer than Adders. Adult females can grow to a length of 100 cm and have occasionally grown to 150 cm in length.


Water Snakes (one of the common names), prefer fresh water habitats, and are often near lakes, ponds, ditches, streams and marshes. They favour areas of water with dense pond plants and aquatic rushes, where they can hide from predators.  These locations are also ideal as their main diet consists of Amphibians and Fish.  They are excellent graceful swimmers and it is quite a treasured sight to see one of these special snakes swimming across the top of your pond in the summer months in search of a meal.  However, if needed, they will also eat small mammals and insects.  Water Snakes don’t spend their entire time throughout the spring and summer around water. They will often spend a hot summer’s day in open clearings, the edge of woodlands and in grasslands, basking in the sun.

 Life cycle

Between October and April, Grass Snakes go into hibernation. They will sleep away the winter months underneath logs, stones, rotting vegetation or even tucked down the end of disused rodent burrow.  Like Frogs, Toads and Newts, adults emerge in April and go on the hunt for a partner.  Females lay eggs 6-8 weeks later during the months of June-July, and can lay anywhere between 8 to 40 eggs.  Grass snakes prefer to lay their eggs in decomposing foliage or in urban garden compost heaps as the eggs will maintain a constant temperature of between 21 – 28 Celsius.  The eggs will hatch in late summer/early autumn about 10 weeks later.  Newly emerged miniature Grass Snakes are totally independent and will go on the hunt over the next few weeks for their first meals, but they too will go into hibernation when winter approaches.


Grass Snakes have quite a lot of predators and quite a few survival techniques when threatened. Foxes, Herons, Badgers and Herons will all favor Grass Snakes as a quick snack.  I sometimes think nature is horrible but it always helps to see the bigger picture!   However, these snakes have a few tricks up their sleeves.  If caught, they secrete the foulest smelling liquid. I know this first hand and it’s certainly enough to put any predator off!  If that does not work these amazing snakes will roll upside down and play dead with their mouths slightly ajar secreting blood!  Now that is truly amazing!

I hope this article gives you an insight into one of the U Ks very special wild snakes, and that you might just be lucky enough to have some visit your water garden to set up home and colonize in your back garden.

Please visit our website to see over 120 articles/blogs on aspects of pond planting, pond plants and all the wildlife that ponds and fresh water habitats can attract, you will also find on our website the UK,s largest selection of pond plants and water garden plants including over 250 different Water Lilies, all available to purchase online or from our retail aquatic nursery in Surrey.