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Ostriches |
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| The distribution of the world’s flightless birds, called ratites, is indicative of the shifting of continents in the Earth’s distant past. Ratites evolved on a landmass called Gondwanaland, which broke apart to give rise to Africa, South America, and Australia. Following this separation, the ratites of each of these continents gradually evolved into one or more distinct species—the ostrich of Africa (shown here), the rhea of South America, and the cassowary and emu of Australia. | ||||||
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| Stan Osolinski/Oxford Scientific Films | ||||||
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| Appears in these articles: | ||||||
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| Bird; Evolution; Ostrich; Animal Distribution | ||||||
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