Once you have chosen your site, you’ll need to mark out the area. The shape of wildlife ponds doesn’t really matter, so it is up to you! For a more natural-looking pond, try a wiggly shape.
Ponds with a range of depths are best for wildlife, so add ledges and aim for around half of the pond to be shallow (less than 25cm deep). Plus, include a deeper zone to allow an ice-free area for frogs to safely lie dormant on the bottom of the pond in winter.
At least one edge of the pond should be gently sloping so that animals (such as hedgehogs) can visit for a drink, but can climb out if they fall in. Ledges in ponds also allow frogs and toads to lay their spawn.