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Richard Knapton has written:
'The Niagara River, an important bird area'
The area of Jurong Bird Park is 202,000.0 square meters.
The area of Lady Bird Lake is 1,893,928.8056832 square meters.
The area of Nata Bird Sanctuary is 230 square kilometers.
The area of Tanji Bird Reserve is 6,120,000.0 square meters.