Habitat loss kills huge numbers of birds and interferes with the natural feeding patterns of wild birds, as well as eliminating the native plants in cities that could be food. The appreciation of nature built through feeding birds is an appreciation that has also helped in preserving habitat, saving native plants, and preserving wild birds.

Bird food does not cause a decreased immunity, but lack of sanitary conditions can increase the spread of pathogens where birds are concentrated. I advise people to read the Department of Fish and Game's recommendations concerning keeping feeders clean and follow the recommendations of not feeding for a month if you visited by Pine Siskins.