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Little blue penguins — the world’s smallest penguin species, also known as fairy penguins or korora — are about a foot tall and weigh about two pounds.

The Department of Conservation’s Graeme Taylor said that tests of some dead korora indicated starvation and hypothermia — especially in baby penguins that have neither the strength nor the endurance to search for food in deep ocean waters.

Environmentalists for more than a year have protested a construction zone at a marina development on Waiheke Island, off the coast of Auckland in northern New Zealand, which they said was disturbing korora habitats.

The birds, also known as korora, have nearly doubled their population in the last decade, and credit is being given to the farmers Francis and Shireen Helps.

Like the flightless kiwi, the 30-centimeter korora became easy prey.