I converted 30 tillable acres over to the USDA Conservation Reserve Program. The practice I selected was to plant some 20 different wildflowers and 4 different grasses in support of Monarch butterflies and Pheasant. It must be working because I have been noting more of the birds and butterflies.
And, (probably not related) I have seen more garter snakes in 2 acres of gardens that surround the house. Fortunately, my dogs are curious when they meet up with one, but do not attack.