LA Times: In recent years, California's Agassiz's desert tortoise population has been decimated by shootings, residential and commercial development, vehicle traffic, respiratory disease and predation by ravens, dogs and coyotes.
Now, dwindling populations of the reptiles with scruffy carapaces and skin as tough as rhino hide are facing an even greater threat: longer droughts spurred by climate change in their Sonoran Desert kingdom of arroyos and burrows, according to a new U.S. Geological Survey study....