I never push wildlife gardens on my clients, because simply investing in your garden is a positive move in itself. But wildlife is my true love so I will definitely encourage and actively support any interest you have.
My job is to allow for unseen access and hiding places in the design (with your permission). Also to choose plants that are known to be good for wildlife, nettles not required I assure you!
You can do your part by simply being a little lazy. Most gardeners start out being very tidy, as they are in the house, this has its pleasure, but it is often when a gardener has been too busy elsewhere that new joys arrive – in the shape of goldfinches on a frosty January morning feeding on those flower heads (now tasty seeds) you never got round to cutting back.
Of course you must brush the leaves off your nice new paving but leave them in between your plants where they will do their work in the ecosystem of your garden.
If you must use chemicals, as I sometimes do, use them with stealth, in the right place at the right time.
Yes this picture is a creature you can see in your own garden around Cambridge! Not a humming bird, but a hummingbird hawk moth. I’ve seen it on my honeysuckle, and here it is sucking nectar with its long tongue from some buddleia.