The California condor
has been described as a bird
"with one wing in the grave."

Flying on wings nearly ten feet wide from tip to tip, these birds thrived on the carcasses of animals like woolly mammoths. Then, as humans began dramatically reshaping North America, the continent's largest flying land bird started disappearing. By the beginning of the twentieth century, extinction seemed inevitable.

But small groups of passionate individuals refused to allow the condor to fade away, even as they fought over how and why the bird was to be saved. Scientists, farmers,...