A levee divides wetlands and a salt pond, colored vibrant red by halobacteria, in San Francisco's South Bay.In This StoryThis story originally appeared in , an online magazine about nature and sustainability powered by the California Academy of Sciences, and appears here with permission.a doorless helicopter was proving more difficult than San Francisco Bay Area photographer joSon had anticipated. Bundled in ski apparel and buckled into his seat, he had done his best to prepare. But the driving winds on this chilly November day quickly numbed his fingers, and more than once his camera...…A levee divides wetlands and a salt pond, colored vibrant red by halobacteria, in San Francisco's South Bay.In This StoryThis story originally appeared in , an online magazine about nature and sustainability powered by the California Academy of Sciences, and appears here with permission.a doorless helicopter was proving more difficult than San Francisco Bay Area photographer joSon had anticipated. Bundled in ski apparel and buckled into his seat, he had done his best to prepare. But the driving winds on this chilly November day quickly numbed his fingers, and more than once his camera...WW…