Birdbaths are a popular addition to any garden, but getting one key element just right can make all the difference in attracting bluetits, robins and goldfinches during the summer.
Perfect Depth for Birdbaths
Most stone birdbaths tend to be excessively deep. While larger garden birds such as pigeons and blackbirds can cope with a depth of up to 5cm, smaller species like bluetits and goldfinches require a depth of 2cm or less to wade safely. If drawing finches and tits is your goal, maintain a water depth of no more than 2cm.
The RSPB explains: "Providing the perfect bird bath can be one of the best things you can do for wildlife in the garden, and one of the most rewarding, too. You can install a bird bath at any time of year, but summer is a particularly critical time when water can be scarce for birds." RSPB guidance adds: "What birds really want from a bird bath is a wide, safe and shallow puddle with a rock or two for perching on."
How to Achieve the Ideal Depth
To attract both smaller and larger birds, a graduated depth is ideal: shallow around the edges and deeper towards the centre. Never exceed 5cm at the deepest point. If your birdbath is too deep, place a flat stone or a couple of pebbles along the edge, totalling about 2cm in thickness. This gives smaller birds somewhere to stand while the centre remains suitable for larger birds. Use granite or slate stones, as they resist deterioration and won't leach into the water. Another method is laying pea gravel across the bottom, offering a variety of water depths.
Before adding stones, wash them thoroughly and ensure they sit flat and stable. Stones must remain stationary when a bird lands on them to avoid startling visitors.
Pro Tip for Birdbaths
All About Birds shares a hack: "To make your birdbath even more attractive, provide some dripping water. Many birds find the sight and sound of moving water irresistible. You can use a commercial dripper or sprayer, or make your own by recycling an old bucket or plastic container. Punch a tiny hole in the bottom, fill it with water, and hang it above the birdbath so the water drips into the bath."
