Waste not want not

Each morning we pour part of our pensions into the bird feeders outside our kitchen window.
A few seconds later the starlings arrive on mass. They eat a few seeds but the majority they toss to the ground. These attract the sparrows and tree sparrows, and they, in turn, attract the big boys, the jackdaws. Later on in the day, when most of the seeds have been vacuumed up, the heavy brigade arrives, the mallards. Their job is to sift through what little remains, in the process turning our "lawn" into a muddy quagmire.
A whole ecosystem on our doorstep!