domingo, 13 de julio de 2014

Exposición: Una vez ellas fueron billones


ONCE THERE WERE BILLIONS

Once an amazing diversity of birds—some in breathtaking abundance—inhabited the vast forests and plains of North America. But starting around 1600, species began to disappear, as humans altered habitats, over-hunted, and introduced predators.





http://library.si.edu/digital-library/exhibition/once-there-were-billions


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