How Ponds Are Essential for Biodiversity

The case for ponds is simple, well-evidenced, and consistently undersold. No single feature delivers a greater return for biodiversity per square metre than a well-sited, well-planted freshwater pond.

This isn't sentiment. Research by the Freshwater Habitats Trust and others has demonstrated that garden ponds collectively support a larger and more diverse range of freshwater species than many protected nature reserves. They provide breeding habitat for all native amphibian species including great crested newt, which is legally protected and in significant decline. They support a wide range of aquatic invertebrates, including dragonflies and damselflies that attract insectivorous birds and bats. They provide drinking and bathing water for birds, hedgehogs, and mammals. And because ponds created without fish are the most ecologically valuable — fish eat the larvae and eggs of many aquatic invertebrates and amphibians — they can be established with minimal ongoing management.

In north-east Scotland, wetland habitats have declined dramatically over the past century. Agricultural drainage, infilling of marshy ground, and the channelisation of burns have reduced the area of freshwater habitat significantly. Ponds once common in farmland and field corners have largely disappeared. The species that depended on them have contracted or vanished from areas where they were once widespread.

A garden pond cannot by itself reverse these trends. But it can create a refuge and stepping stone — a place where species persisting in larger wetland reserves can establish satellite populations, reducing the risk of local extinction. In a landscape where wetland habitats are fragmented, even small water features that are ecologically well-designed can play a disproportionate role in connectivity.

Design matters significantly. Ponds with gently sloping edges allow amphibians and mammals to enter and exit safely. A range of water depths — from very shallow margins to deeper central areas — supports different communities of aquatic plants and invertebrates. Native aquatic and marginal plants, from water forget-me-not and marsh marigold to bogbean and water mint, provide structure, oxygen, and food. Avoiding fish, and siting the pond in full or partial sun, all contribute to ecological performance.

At Greener Huntly, pond creation and enhancement is one of the most consistently impactful interventions we recommend and carry out, whether for private gardens, farms, or public greenspaces. We design ponds to work with the existing topography and drainage of a site, using local plant species and, where possible, locally sourced materials.

If you have even a small area of wet or low-lying ground, it is worth talking to us about whether a pond is possible. A corner of water is rarely wasted.