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Feather from common grackle (Quiscalus quiscula), now the most abundant type of breeding bird in North America. Common grackles are considered a significant pest in many areas, since they feed on agricultural grains and seeds, especially corn. Enhanced SEM. Image width: 612 micrometers. Bar: 100 micrometers. Magnification: 163x if the image is printed 10 cm wide.
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