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These gorgeous finches are boreal forest inhabitants and are designed to retrieve the heavily protected seeds of white pines with unusual beaks precisely adapted to this. The upper mandible is much longer than the lower, and they cross one another. This enables the bird to pry open pinecones and easily remove the seeds hidden deep inside. In fact, these birds are so well designed to eat these seeds that they may eat 3000 of them in one day! If you are unsure from a distance what finch you are looking at, just listen as White-winged Crossbills have a lovely and unmistakable song.