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.
You will also have more success in your backyard or garden if you are feeding the birds what they like. Natural foods that birds eat include insects, worms, berries, fruit, flower nectar, nuts, seeds, tree sap, buds of trees and shrubs, fish, small animals, other birds, and eggs.They even scavenge dead animals. You can get a clue what a bird eats by the type of beak or bill the bird has.or a look at different types of bird beak see Anatomy. Other factors that determine a bird s diet include flight habits, sight, and hearing. For example birds like the swallow that feed while flying, rely mostly on insects for food. The eyesight of eagles, and hawks lets them see prey from great distances.