Sadly, in the absence of any grazing livestock, I must spend some of my time wandering about with a mower or a brush-cutter trying to do what a cow would do. I'm aiming for a diversity of sward height: really short sward for the Autumn Lady's-tresses and other species that like it, tussocky sward for the voles and Harvest Mice, and everything in between. Hopefully, it also works out for a variety of plants and wild flowers.
I'm grateful to the animals that help make the grassland even more diverse by creating a bit of bare ground. Rabbits with their scraping:
Humans digging holes. I created a patch of bare ground here three years ago to see what would happen (the answer was not much, though we did have Common Poppy in the garden for one year):
This is my favourite photo illustrating the importance of bare ground for invertebrates:
