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Microfibers identified in seabird feces (Larus dominicanus, Spheniscus magellanicus). (a) Blue microfiber identified in Magellanic penguin feces; (b) red microfiber identified in Magellanic penguin feces; (c) black microfiber identified in Dominican gull chick feces; (d) red microfiber identified in Dominican gull chick feces.
