Why would lettuce grow better if there were a lot of birds in the garden?

Lettuce could grow better with a lot of birds in the garden because birds can help control pest populations that may harm the plants. They feed on insects like aphids and caterpillars, reducing the need for chemical pesticides. Additionally, birds contribute to the ecosystem by aiding in pollination and dispersing seeds, which can enhance soil health and plant diversity. Their droppings also serve as a natural fertilizer, enriching the soil with nutrients.