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In total, 130 juvenile and sub-adult kaki, or black stilts, were released on to the edge of a riverbed in the Mackenzie Basin in batches last week.
Department of Conservation senior biodiversity ranger Dean Nelson said the more than 2200 traps set in the habitat for the world's rarest wading bird by Te Manahuna Aoraki would increase the birds' chances of survival.
There are only 129 adult kaki living in the wild.