There are few places that are as exhilarating to walk through as our UK coastal sand dunes, accompanied by the sounds of the tide lapping on the shore. But, take a moment to look down at your feet and you’ll find these dunes are home to a wide variety of wildflowers, insects and birds.
Here is our expert guide to sand dunes in the UK, including the wildest dunes to visit and best wildlife to spot.
What is a sand dune and how is it formed?
Towering dunes, sometimes more than 60 feet tall, begin life as grains of wave-worn sand and seashell fragments. These are blown along the beach until they become trapped among plants that grow above the strandline, such as the beautiful lilac-flowered sea rocket.
The striking spiny purple-blue flowers of sea holly glow in the dunes at Godrevy beach in Cornwall (Photo by: David Chapman via Alamy)
Grassy plants such as sand couch and marram grass have deep fibrous roots that slowly bind the sand together, while more grains become trapped among their leaves that grow fast and resist burial.
The lofty yellow dunes that form over time have shifting ridges that are among the harshest habitats for plant life, but coastal specialists thrive here, including sea holly and the trailing stems of sea bindweed.
Best sand dunes to visit in the UK
It is possible to explore sand dunes along much of the UK coastline, with these seemingly harsh habitats providing a haven for wildlife.
Here’s our pick of the wildest sand dunes to visit in Britain:
Dune slacks are home to 11 species of orchid, including the unique Lindisfarne helleborine. When visiting, take care to check safe times for crossing the tidal sands.
Sand dunes in Lindisfarne national nature reserve, Budle Bay, Northumberland coast, England, UK. (Photo by: Geography Photos/Universal Images Group via Getty Images)
This is the second-largest sand dune system in the UK, covering 1,000 hectares with all stages of dune development. It’s also home to 33 species of butterfly and 470 species of flowering plant.
Braunton Burrows, Sand dunes, North Devon, UNESCO Biosphere Reserve (Photo by: myLoupe/Universal Images Group via Getty Images)
There are natterjack toads here; it’s also an important breeding location for little terns and ringed plovers, nesting close to the strandline. Look out for grayling butterflies and sand wasps in the fixed dunes.
The sand dunes at Holkham beach are home to a number of different coastal animals, including Ringed Plovers
An orchid-enthusiast’s delight, with species that include pyramidal orchids, marsh helleborines and autumn lady’s-tresses. The dunes also support some rare fungi, including winter stalkball – like a puffball fungus on a stalk.
This footbridge over the River Kenfig (Afon Cyffnig) connects Kenfig Natonal Nature Reserve and the Margam Moors (Photo by: eswales via Geograph)
One thousand hectares of dunes on the edge of the North Sea, hosting a large breeding population of sandwich terns. Dunes grade into flowery coastal heathland teeming with insects.
Forvie National Nature Reserve is renowned for its birds and has a number of different trails to explore (Photo by: Arterra via Getty Images)
Some of Northern Ireland’s tallest dunes on the edge of the Bann River estuary. Rabbit-grazed fixed dunes covered in a tapestry of bird’s foot trefoil, wild thyme and dune pansies, with pyramidal and bee orchids.
East Head, West Wittering, Sussex
Ringed plovers nest just above the sand dunes and skylarks breed among the marram grass in this dune system on the edge of Chichester Harbour.
East Head Beach, West Sussex, captured at dusk in Autumn (Photo by: Barcroft Media via Getty Images)
This is Kent Wildlife Trust’s largest reserve, a mosaic of coastal habitats that include sand dunes with sea holly, and fixed dunes that host rare lizard orchids and fragrant evening primrose.
The coastal path through Sandwich and Pegwell Bay NationalNature Reserve, Kent, is home to a stretch of Lizard Orchids (Photo by: Robin Webster via Geograph.)
The golden rules for visiting dunes
• Always stick to obvious footpaths or boardwalks – these minimise the erosive impact of passing feet
• Pay heed to signs warning visitors away from sensitive areas – here, marram grass replanting has often taken place, or seabirds may be nesting
• Be mindful of your pets – some of our rarest breeding birds, such as the little tern and ringed plover, nest along dune edges just inland from the strandine. This is their home, and unruly dogs can ruin their chances of nesting successfuly
• Steer clear of ‘dune surfing’ – it’s so tempting to slide down the loose sand on the seaward-side slopes of high dunes, but this can open it up to scouring winds that will whisk away what nature has taken many decades to build and bury the rich fixed-dune biodiversity
Best wildlife to spot in sand dunes
It’s hard to imagine a more perfect place to picnic than in the sun-drenched, sheltered hollows of a sand dune, so settle down amongst grayling and common blue butterflies, serenaded by the sounds of grasshoppers and stonechats, and watch lizards hunting insects.
This part of the dune system is home to a fascinating array of unusual species, including burrowing sand wasps that hunt caterpillars and day-flying crimson-and-black burnet and cinnabar moths.
A ringed plover with its one-day-old chick, nesting amongst the marram grass
Sand lizard, Lacerta agilis
One of our rarest and most beautiful reptiles, it digs narrow tunnels in dunes for winter hibernation. The flanks of courting males turn bright green in spring. It buries its eggs in sand, in sheltered dune hollows, where the eggs depend on the sun’s warmth for incubation.
Habitat destruction has meant the sand lizard is one of the Uk’s rarest reptiles
Autumn lady’s-tresses, Spiranthes spiralis
The last native orchid to flower, and unmistakable with its six-inch-tall spikes of white florets twisted in a spiral, like braided hair. It cannot survive competition from tall grasses, so look for it in the short, flowery turf in fixed dunes.
Grayling butterfly, Hipparchia semele
Our largest brown butterfly, but surprisingly difficult to spot when it settles and quickly closes its wings, thanks to the cryptic colouring of its undersides. The caterpillars feed on various grasses, including marram.
Grayling butterflies can be found all over Europe, but are particularly common in coastal areas
Sea rocket, Cakile maritima
Produces seeds in buoyant pods that act as lifeboats and are carried by sea currents, then wash up to germinate on the strandline. Fleshy leaves and masses of lilac flowers attract bees and butterflies, while the plant traps windblown sand and begins building dunes.
Plantlife in sand dunes can be easily disrupted by visitors if paths are not used
Hound’s-tongue, Cynoglossum officinale
A tall, hoary-leaved biennial, often growing in the fixed dunes. Flowers the colour of dried blood are often described as smelling of mice, although Richard Mabey likened their aroma to roasted peanuts. Its hooked seeds are dispersed in rabbit fur.
Pyramidal orchid, Anacamptis pyramidalis
With its densely-packed pyramids of pink flowers, young inflorescences resemble small strawberry ice-cream cones. Most commonly found between marram and lyme grass, where yellow and fixed dunes merge. Flowers have long, slender nectar spurs and a slightly foxy scent at dusk, attracting long-tongued moth pollinators.
Pyramidal Orchids appear in a variety of shades along coastal paths, ranging from light lilac to vibrant pink (Photo by: Tim Graham via Getty Images)
Stonechat, Saxicola rubicola
This robin-sized bird likes to perch on the highest bushes in the dunes, flicking its wings then darting down to the ground to catch insects. It sometimes nests in the protection of prickly gorse bushes in the dune scrub. Its call sounds like two stones being tapped together.
Stonechat birds are found more widely in winter and have short robin-like tails
Sand wasp, Ammophila sabulosa
Hunts caterpillars, which it paralyses then carries back to its nest hole excavated in the sand to feed its developing larva when it hatches. The wasp temporarily closes the nest tunnel until fully provisioned
with prey, then seals it with mud.
Red banded sand wasps are found all over Britain, but are more common in southern England (Photo by: Education Images via Getty Images)
Sand dune plants to spot
Walk a little further inland and you’ll find fixed dunes. Here the soft sand becomes firmer, and the tang of salty air and seaweed gives way to the aroma of wild thyme underfoot.
These areas are often encrusted with grey lichen and drought-tolerant mosses, which are stabilised by a tapestry of ground-hugging wildflowers. Look out for:
- Kidney vetch – small yellow flowers that flower between June and September, often appearing fluffy and in clusters
Look down! Kidney vetch flowers are usually found close to the ground, and often appear wooly (Photo by: De Agortini Picture Library via Getty Images)
- Biting stonecrop – these are also yellow in colour but star-like in shape, and flower between May and July
Biting stonecrop is traditionally found on well-drained ground such as sand dunes or shingles (Photo by: De Agortini Picture Library via Getty Images)
- Restharrow – this perennial has pinky-lilac petals, is greasy to touch, and is most common in the summer months
Restharrow plants feature small pink petals and thrive in chalk and limestone grasslands (Photo by: Flower Photos via Getty Images)