sentences:  Historically, the San Juan watershed supported up to 12 invertebrate species, 5 fish species, 12 amphibian species, 35 reptile species, 143 bird species, and 42 mammal species, which benefited from the diverse vegetation communities present.Some streams and ponds host federally listed endangered/threatened species such as tidewater goby, fairy shrimp, and California red-legged frog.Federally listed bird species include least Bell's vireo, California gnatcatcher, California least tern, and southwestern willow flycatcher.