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Mammals evolved from reptiles about 220 million years ago. After the extinction of dinosaurs around 65 million years ago, mammals diversified to fill the many vacated niches in a wide range of habitats. Mammals now patrol the skies, inhabit the seas, and migrate across the land.
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Black BearAs the most common bear on the continent, these powerful creatures are on the Texas State endangered species list. |
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OcelotNot much bigger than a house cat, the Ocelot is a fun yet rare feline to encounter. |
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Mexican Free-Tailed BatThis animal preys on flying insects, consuming its body weight in mosquitoes and agricultural pest like cutworm and corn borer moths each night. |
Nature picture credits (top to bottom): Paul Berquist, and The Nature Conservancy.
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