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One of the barrier island s along Virginia 's Atlantic coast , it protects various marsh , beach , grassland , dune , and shrub land habitats , and has been designated an Audubon Important Bird Area for its importance as a nursery for nest ing bird colonies .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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