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The Bay Delta's white sturgeon was once lauded as a success story. Now it's declining anyway.
If there were any Delta fish tailor-made to withstand the drought, it would have to be the Sacramento perch. And yet it's almost certainly extinct in the Delta.
The confusing genetics of this endangered south Delta mammal teach us about more than half a million years of history.
The riparian brush rabbit, found in just a few patches of forest in the Delta, may be California's most endangered mammal.
The Threatened Delta smelt is famous, but there's another smelt in the Bay Delta whose decline is worrying wildlife partisans.
Green sturgeon are highly adapted to conditions in the Bay Delta -- but those conditions are changing too fast for the sturgeon to keep up.
The splittail was once abundant. Now its numbers are dwindling. But it isn't protected by either the state or feds.
In 2010, foes of a controversial Delta beetle tried to strip it of its Federal protection. But wildlife advocates argued back -- and the science backed them up.
The Bay Delta's ecological productivity has dropped catastrophically. And the culprits live in the estuary in unimaginable numbers.
The more you study the Delta's sleek, silvery steelhead, the less you realize you know.
A fish, a frog, and a turtle have caused widespread damage to the Delta...and we brought them here on purpose.
Scientists differ over the degree of harm this fish might causing native wildlife, many Californians are happy to have a chance to see it. Especially steamed with ginger and lemongrass.