Why amphibians need sheltered spaces

In a UK wetland garden, a pond may be the headline feature, but the surrounding cover is what keeps amphibians alive. Newts, frogs and toads are soft-skinned and slow to escape danger. Without damp, shaded shelter, they are easy pickings for herons, cats, magpies and even hedgehogs. Shelter also gives them somewhere to rest during hot spells, to forage in safety, and to hibernate through winter. A wildlife pond without log piles, stone crevices and dense planting is like a house without bedrooms: useful, but incomplete.

Different species use cover in different ways:

• Smooth newts and palmate newts often hide under stones, logs and thick vegetation.
• Great crested newts, which are protected in the UK, prefer deeper refuges such as log piles and mammal burrows.
• Common frogs tuck into leaf litter and compost.
• Common toads are walkers rather than jumpers, so they rely on cracks, crevices and dense ground cover to move safely between feeding and breeding sites.

Give them these features and your garden becomes a genuine refuge.

Log piles: the backbone of amphibian habitat

A log pile is the single most valuable shelter you can build. It is cheap, quick and endlessly useful. Choose untreated hardwood logs – oak, ash, beech, cherry or apple are ideal. Softwoods rot quickly, though a few pine logs can be added if you have them. Aim for logs 15–30 cm (6–12 in) in diameter and 1–2 m (3–6 ft) long. Keep the bark on; beetles and fungi will move in, and amphibians follow the damp, dark spaces between.

Site the pile in dappled shade, not full sun and not bone dry. A spot under a shrub or on the north side of a hedge works well. Partly bury the bottom logs to keep moisture in. Stack the rest loosely in a criss-cross pattern, leaving gaps of 2–5 cm. Add a few handfuls of leaf mould, moss and soil between layers. You can also drill a few 22–28 mm holes into some logs to create instant newt-sized tunnels. Avoid moving the pile once built, especially between November and February when amphibians may be hibernating inside.

Stone walls, rockeries and crevices

Dry-stone walls are superb amphibian hotels. The gaps between stones stay cool and humid, and the wall's sunnier side offers a warm basking spot. Build or repair a wall with no mortar, using local stone if possible. A height of 50–100 cm is plenty. Leave small crevices open rather than filling every gap. Where the wall meets the ground, add a layer of soil and leaf litter so frogs and toads can slip underneath.

If a full wall is too much, a rockery or a simple pile of stones will do. Use sandstone, limestone or slate. Arrange them so there are dark, damp voids at the base. Toads especially appreciate a snug crevice, and newts will hunt small invertebrates among the stones. A broken clay flowerpot, placed on its side and partly buried, can serve as a temporary shelter while plants grow in. Always avoid sharp edges and keep the area free of slug pellets, which are lethal to amphibians.

Dense planting for cover and corridors

Plants are living shelter. Around a wetland pond, aim for layers: tall emergents, bushy marginals and low ground cover. Native species are best because they support the insects amphibians eat. Good choices include marsh marigold, meadowsweet, purple loosestrife, water mint, ragged robin, soft rush and pendulous sedge. For shade and structure, plant lady fern, royal fern and bugle. Shrubs such as alder buckthorn, guelder rose and willow create cool, damp microclimates and safe corridors between pond, log pile and wall.

Leave some areas deliberately wild. A patch of long grass, nettles and leaf litter may look untidy, but it is a lifeline. Dense planting also breaks up the sightlines of predators, so amphibians can move without being seen. If you have a cat, fit a bell or keep it indoors at dawn and dusk, when amphibians are most active.

Compost heaps, leaf litter and brash

A cool, undisturbed compost heap is a classic amphibian hibernation site. Grass snakes and slow worms use them too, which is a bonus for wildlife gardeners. Turn your heap less often in autumn and winter, and always check before forking it over. Leave a corner untouched from October to March.

Leaf litter is another simple winner. Oak, beech and hornbeam leaves break down slowly and create a damp, insulative layer. Rake them into corners, under hedges and around the base of log piles. A brash pile – twigs, pruned branches and dead stems – mimics the tangled debris of a natural wetland edge. Stack it loosely, and let moss and fungi colonise. Frogs and toads will burrow into the damp lower layers, while newts will thread through the gaps.

Keeping shelter safe and undisturbed

Once your shelters are in place, the main job is to leave them alone. Amphibians are creatures of routine. Disturbance in winter can be fatal, as they cannot quickly move to new cover. Avoid moving logs, stones or compost between November and February. If you must work nearby, do it gently and by hand.

Keep the area free of chemicals. Slug pellets, weedkillers and insecticides all harm amphibians directly or remove their food. Provide a shallow, pebble-edged ramp from the pond so young frogs and newts can climb out easily. A few flat stones at the water's edge will do. Finally, be patient. Build the habitat, keep it damp and quiet, and the newts will find it. In a good UK wetland garden, a log pile can teem with life within a single season.