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Here we use multilocus population genetics to study population history and historical demographic processes in the ruddy duck ( Oxyura jamaicensis ) , a stiff - tailed diving duck comprising three subspecies distributed from Canada to Tierra del Fuego and inhabiting wetlands from sea level to 4500 m in the Andes .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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