Blueberries are available for wildlife, animal and bird food for many months, and wild berry plants growing on vines, bushes and trees, offer inexpensive wildlife food for hunters of wild birds and animals. Birds such as quail, dove and ducks can enjoy the cover and protection offered by the thorny blackberry bushes and from vines that climb and wind along fences at the forest edge. Since these berry plants are perennials, they regrow predictably and reliably every year. The berry seed when eaten by wildlife birds and animals can be spread by droppings and often will grow into new berry plants. Raspberry plants are usually rarely found in the wild state, but hybrid raspberries grow in many shades of colors of red, yellow, purple and black. Black raspberries are delicate and tasty but do not have the yields, cold hardiness or extended shelf life of the red raspberry. Most fresh red raspberry, commercial production in the United States has been dramatically increased because of the soaring demand by millions of satisfied berry tasters.