If space is tight, many of the benefits of a garden pond can be achieved simply by letting a large water-tight container – such as an old sink, half-barrel or bathtub – fill with rain, then varying its depth by putting in plants, planters, rocks and pebbles.
In larger gardens, look for a site which catches the sun for some – but not all - of the day, as some of the most fascinating pond creatures need both warmth and shade to prosper.
If possible, stay away from leaf-shedding trees or bushes, to save time on pond maintenance.
Size is a matter of taste and space. While ponds with a surface area of at least four square metres are better for wildlife even smaller ponds can look just as attractive and provide equally welcome rest and refreshment sites for many creatures.