| The skeleton and body form is usually unspecialized, enabling pigeons to feed and roost arboreally yet also collect food from the ground. |
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| Supported by slender steel columns that splay arboreally at their tops, the concrete canopy is perforated by a series of different-sized oculi. |
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| In the Early Miocene, about 22 million years ago, the many kinds of arboreally adapted primitive catarrhines from East Africa suggest a long history of prior diversification. |
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