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A flock of black swans (Cygnus atratus) gather at Lake Whāngāpē, near Huntly. Black swans were introduced from Australia in the 1860s. They are partly protected, and a limited number may be taken during the duck-shooting season. Research suggests that the swans may be useful in controlling the spread of some introduced water weeds.
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Reference: 10044387
by J. L. Kendrick
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