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While the female rockhopper is away hunting, the male vomits up “milk” from his stomach to feed the chick. VU BIRDS All penguin species are having problems finding enough food. Rising sea temperatures and unpredictable climate changes are forcing prey to move to new areas and penguins have to travel farther to find it. Humans are also taking too many fish, which means there is less for penguins to eat. Population Several hundred thousand remain, but some populations have halved in size. Size 20 in (52 cm) tall Weight 6½ lb (3 kg) Diet Mainly krill, also squid, crustaceans, octopus, fish Habitat Nests on cliffs and rocky gullies on ocean islands, near fresh water Lifespan Around 10 years Range The southern rockhopper and northern rockhopper live on different islands in the Southern Ocean.

Only two species remain. Although tuataras can live up to 100 years, they are slow to breed. They are under threat from introduced species and climate change. 46 (c) 2011 Dorling Kindersley. All Rights Reserved. Stormy weather If they disappear, many other species will be affected. Among the many threats reptiles face are habitat loss, climate change, pollution, invasive species, and disease. They are also hunted for food and the pet trade. REPTILES Reptiles play a key role in many ecosystems. Scientists think reptiles may be even more vulnerable to climate change than amphibians.

57 (c) 2011 Dorling Kindersley. All Rights Reserved. CR Southern bluefin tuna Thunnus maccoyii FISH Tuna is one of the tastiest fish in the sea. The bluefin tuna is particularly prized, but demand for its flesh is pushing it to the brink of disaster. Population Believed to have declined by more than 95 percent since the 1960s Size 61⁄2 The coloring of tuna—steely blue on top, and silvery white below—provides the perfect camouflage against predators above and below them. –13 ft (2–4 m) Weight 440–880 lb (200–400 kg) Diet Smaller fish, octopus, squid, eels, crustaceans Lifespan 15–40 years Range The southern bluefin lives in the Atlantic, Pacific, and Southern oceans.

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