Orioles Are Drawn To Dark Fruit

 Baltimore Orioles are fans of dark colored fruits.

 Picture from Carolina Bird Club

Most fruit eating birds, like robins, tend to graze on any fruit they can find.  The Baltimore Orioles however, prefers only ripe, dark-colored fruit like mulberries, red cherries and purple grapes.  They'll ignore the lighter colored fruits like green grapes and yellow cherries, even if they are ripe.