Answer: 51.

Answer: It evolved in forests with no ground predators (no mammals except bats), and it is very heavy.

Answer: every two to four years

The text says 'once every two to four years'.

Answer: Any two of: moving them to predator-free islands; fitting each bird with a transmitter; watching nests through the night; hand-raising eggs or chicks in trouble.

Answer: Freezing worked against birds of prey that hunted by sight, because the kākāpō's green feathers hid it. The mammals people brought, such as rats, stoats and cats, hunted by smell, so freezing did not hide the kākāpō from them.

Answer: The population is still very small, and it faces disease, a small gene pool and a slow, irregular breeding cycle.

Answer: Kākāpō only breed when trees like rimu produce a heavy fruit crop every two to four years, so in most years few or no chicks are raised.

Answer: It speaks directly to the reader with 'Imagine…', describes surprising details (a parrot that can't fly and smells of honey), and builds to a dramatic statistic ('only 51 of them left').

Answer: To finish on a hopeful, inspiring note and leave the reader with the main message: that careful, long-term conservation work can succeed.

Answer: colouring that helps an animal blend into its surroundings

Its mossy-green feathers let it blend into the forest.

Model answer: The kākāpō's story shows that humans have caused great harm and also great good. People brought rats, dogs, stoats and cats, which hunted by smell, and they cleared forests for farming, so by 1995 only 51 birds were known to exist. However, people have also led one of the most intensive recovery programmes in the world: moving every bird to predator-free islands, tracking each one with a transmitter and hand-raising chicks in trouble. As a result, numbers have risen to more than 200. The same species that people pushed to the edge has been brought back by people, which suggests that human choices decide whether endangered species survive.