I see men and boys washing down lawns with large hoses coming from those large tanks. I wonder if the people who have subscribed to those services know what is in those large containers. B irds want and need good habitat. They will search for it. Habitat means good food, water, space and shelter.
Food is very important.
If no food is present, there is no reason to visit. If there is no food in the neighborhood, they stop coming. I nsect poisons kill nearly all the insects. There are mostly good insects in a poison-free yard. Some sprayed insects carry their poison to the birds in the nest.