The move is a first for New Zealand.
There are fewer than 1000 bittern remaining in New Zealand, and their wetland habitat is increasingly coming under pressure.
The hard work is destined to be washed away by incoming tides.
The lava is helping predict what might happen in an eruption.
The tuatara became pregnant last year, buried her eggs, but no one knew until now.
Many of the exhibits have gone on to become permanent, and its contemporary art collection is the envy of many other cities.
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