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The " bay wren " ( " Cantorchilus nigricapillus " ) is an attractive and highly vocal wren species , readily observed in forested areas , especially along watercourses , in the lowlands and foothills of parts of southern Central America and northwestern South America .
 Central America, South America
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Central America, South America