When it decomposes it enriches the soil. Allow some weeds to grow. Many weeds supply seeds for birds and other wildlife. Build bat houses for the garden. On average, a single bat eats 3,000 to 7,000 insects per night.
Wildlife needs cover from predators.
Shrubs, food plants, rock and brush piles, snags, downed logs, and other woody material make good cover. Space is important. Animals need safety zones with food, cover, and water, especially during nesting season. Minimize or eliminate use of pesticides, herbicides, and chemical fertilizers. Birds, fish, and mammals are all sensitive, directly and indirectly, to chemical exposure through their food supply.