03/18/2010 05:12 am ET Updated May 25, 2011

Colorado Endangered Species List May Expand

From wolverines to black-tailed prairie dogs, dozens of species here and across the nation are being re-evaluated for possible threatened or endangered status.

The Obama administration is taking a fresh look, in many cases under court order, at Bush administration rejections of special status. A move to prevent extinction of more plants and animals could limit housing construction and energy development.

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