It is called the Connecticut Warbler because the first specimen
was collected in Connecticut and it's a type of warbler.
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Yes, "National Geographic Magazine" is capitalized because it is the proper name of a specific publication.
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You can purchase magazine holders for National Geographic from
www.levenger.com. They can also be purchased from Amazon or through
the National Geographic magazine where you are likely to receive a
discount if you are a subscription holder.
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The National Geographic Society was founded on January 27, 1888. The National Geographic Magazine was first published nine months after the Society was founded as the Society's official journal.