Biology Chapter 17-2

Biology Chapter 17-2 - They usually have webbed feet for...

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Chapter 17 Section 2 - Kinds of Birds There are about 10,000 species of birds on Earth. Birds vary in color, shape, and size. The smallest bird is the bee hummingbird. It weighs 0.06 ounces. The largest is the North African ostrich. It weighs 275 pounds. Most birds can be grouped into one of four groups: flightless, water, perching, and birds of prey. Flightless Birds Some flightless birds run quickly to move around. Example - ostrich Some are skilled swimmers. Example - penguins Some hunt at night for worms and caterpillars. Example - kiwi Water Birds Many flying birds are also comfortable in water. These include cranes, ducks, geese, swans, pelicans and loons.
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Unformatted text preview: They usually have webbed feet for swimming. Or long legs for wading. They find food both in water and on land. Some have rounded, flat beaks for eating plants and small invertebrates. 1 Some have long, sharp beaks for catching fish. Perching Birds Have special adaptations for resting on branches. If a bird falls asleep, its feet automatically closes around a branch. Birds of Prey Hunt and eat other vertebrates. They have sharp claws on their feet. They have a sharp, curved beak. They have very good vision. 2...
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Biology Chapter 17-2 - They usually have webbed feet for...

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