Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There...

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Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major differentiating characteristics: wings for flight, feathers, and a beak rather than teeth AVES (BIRDS)

Transcript of Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There...

Page 1: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.

Birds first appeared about 150 million years ago. Birds now live almost everywhere on

Earth.There are over 8,000 species of birds. Birds have 3 major differentiating characteristics: wings for flight, feathers, and a beak rather

than teeth

AVES (BIRDS)

Page 2: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.

                

                   

                  

                   Birds have adapted their vertebrate skeleton for flight. Their bones and skull are very thin,

making their bodies extremely light.To support flight also required other changes

to their skeleton. Obvious changes are the addition of wings

AVES (BIRDS)

Page 3: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.

Other changes are less obvious. The claws and muscles of a bird's foot are designed to

lock and hold onto a perch even while the bird is sleeping.

A bird's respiratory system is also adapted to make it easier to breathe at high elevations,

where air is thinner.

AVES (BIRDS

)

Page 4: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 5: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 6: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 7: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 8: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 9: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 10: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 11: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.

E A G L E

Page 12: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.

HORNBIL

Page 13: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 14: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 15: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 16: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 17: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 18: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 19: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 20: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 21: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 22: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 23: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 24: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.
Page 25: Birds first appeared about 150 million years ago. Birds now live almost everywhere on Earth. There are over 8,000 species of birds. Birds have 3 major.