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HOW TO LOOK AT A BIRD Field Marks. These are the unique combinations of color, pattern, and shape that mark and separate each species. Field marks are not always visual; behavior plays an important role in most identifi
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Document Date: 2010-08-05 15:11:01
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HOW TO LOOK AT A BIRD Field Marks. These are the unique combinations of color, pattern, and shape that mark and separate each species. Field marks are not always visual; behavior plays an important role in most identifi