Dr. Kenneth E. Campbell, in front of the 25 ft. wingspan Argentavis magnificens. Display from the Natural History Museum, Los Angeles. The feather size from such a bird is estimated to have been 1.5 meters long (60 inches); and 20 centimeters wide (8 inch
Dr. Kenneth E. Campbell, in front of the 25 ft. wingspan Argentavis magnificens. Display from the Natural History Museum, Los Angeles. The feather size from such a bird is estimated to have been 1.5 meters long (60 inches); and 20 centimeters wide (8 inch
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