I think birds might be the best wildlife to attract, with a birdbath. While there for that, they'll look around for tasty morsels like slugs and moths. There are inexpensive little solar water pumps that can allow you to create a wide variety of bird baths & fountains.
Lining the drain holes of pots with window screen can also help keep pests like slugs and snails from getting into the soil. Mixing some diatomaceous earth into the soil, or sprinkling it on top & watering it in could help.
