Microhabitats for biodiversity: a guide to creating shelters for beneficial wildlife

Biodiversity is not only the heritage of large nature reserves: every garden, terrace, or green space can contribute to the conservation of species. A garden rich in biodiversity is healthier, more resilient, and more fascinating, and creating microhabitats means offering shelters, food sources, and environments favorable to small animals, insects, and amphibians.

A microhabitat is a small environment with specific conditions that hosts adapted life forms. Unlike a complete habitat, it is localized and temporary, but it has a significant impact on the presence of useful wildlife. Encouraging these spaces means stimulating the presence of pollinating insects, natural predators of pests, and small animals that enrich the ecosystem.

• Different types of microhabitats and their function
• Step-by-step guide to creating a microhabitat

Different types of microhabitats and their function

Dead wood and log piles 

Dead wood is a natural shelter for decomposing insects (such as wood-boring beetles), small mammals, amphibians, and reptiles. Leaving a log pile in the ground or a pile of branches in a shaded corner of the garden stimulates microfauna and contributes to soil fertility.

Dry stone walls and rock piles

Dry stone walls, in addition to being aesthetic elements, create crevices ideal for reptiles, spiders, insects, and small rodents. Rock piles can be easily made with local materials and offer protection from predators and extreme weather conditions.

Spontaneous hedges and wild vegetation

Hedges made of native plants provide shelter, food (berries, nectar, seeds), and nesting places for birds and insects. Leaving "wild" areas in the garden contributes to the creation of ecological corridors for wildlife.

Temporary or permanent ponds

Even a simple buried basin can become an aquatic microhabitat. Ponds are essential for amphibians such as frogs and newts, but they also attract dragonflies, birds, and aquatic insects. The important thing is to avoid using chlorine and to favor natural aquatic plants.

Gravel and sand

Spaces with sand or fine gravel are essential for insects such as solitary bees, which nest in the ground. These well-drained and sunny environments are easy to create and require very little maintenance.

Step-by-step guide to creating a microhabitat

If you want to create an environment suitable to help the survival of small but extremely useful species, follow these steps. 

1. Observe your garden: identify unused, shaded, or sun-exposed areas, depending on the type of shelter.
2. Choose the most suitable microhabitat: assess the availability of materials, climate, and space.
3. Prepare the ground: remove chemical debris, maintain a varied plant cover.
4. Build the shelter: use natural or recycled materials. Avoid plastic or painted elements.
5. Let nature do the rest: avoid too frequent interventions, observe who arrives and how they use the shelter.

It can also be interesting to keep an observation diary, where you can write down dates, sighted species, and behaviors. You can use apps like iNaturalist or Seek to identify plants and animals. Involve children or neighbors to turn observation into an educational and collective activity.

Below are some tips and mistakes to avoid.

• Do not use pesticides or chemical fertilizers: they alter the microclimate and poison the guests.
• Do not prune or remove everything in autumn: many animals spend the winter in hedges and log piles.
• Do not overwater: favor the presence of dry or seasonal habitats.
• Favor natural seasonality: every species has its time.

In this way, you will discover that even a small space can become a vital refuge for many species. Creating microhabitats is a concrete, easy, educational, and powerful gesture to protect biodiversity and improve the quality of our daily environment.