In recent years, experts have discovered more far-reaching effects of vitamin D deficiency. In 2009, researchers from the University of Missouri-Columbia found that insufficient levels of vitamin D are associated with inflammation, an immune system response that can cause fluid buildup and swelling.
1 of 19 Facebook Pinterest. Feeding birds comes naturally when you grow trees and shrubs with nutritious berries. The plants you'll find in this slideshow do double duty: They attract birds and create a beautiful display with their flowers, fall colors, and fruits adding sparkle to your landscape. 2 of 19 Facebook Pinterest.
Vegetables: Birds eat a lot of seed and plant material, and scrap vegetables can be a welcome feeder treat. Frozen peas or corn (thawed first), leftover baked potatoes or bits of canned vegetables, even from canned soups, can all be offered to backyard birds.