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.
12 of 19 Facebook Pinterest. Serviceberry Robins, thrushes, and other birds are quick to eat the fruits of serviceberry (Amelanchier selections), a small tree or large shrub, depending on the variety. Types range from 4 to 25 feet tall, but all offer pretty springtime blooms and great fall color. Zones 4-9, depending on type.