The U.S. Fish and Wildlife Service announced on Tuesday it approved a 20-year agreement with the Lower Colorado River Authority to conserve "four freshwater mussel species in the lower Colorado River basin of Texas."
The U.S. Fish and Wildlife Service (FWS) declared 21 species extinct Monday, including 10 birds and two freshwater fish. The species, which the agency removed from the list of those protected under the Endangered Species Act (ESA) due to extinction, are part of a list of 23 that were proposed for delisting two years ago. At…