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.
Overall, these birds are very flexible in their diet and most species are omnivorous or opportunistic. They especially love to find bugs inside of tree trunks or in the rotted wood or crevices of a tree. Some of their favorite treats include ants, termites, beetles, grubs, caterpillars and spiders.