For one rare bird, flight from South Florida’s changing climate sparks a surprising revival

Birdlife International, which tracks the status of all birds, says 40 percent of the Earth’s 10,000 species are in decline. Beneath that statistic, a complex and mysterious natural triage is unfolding. Some species, such as blackbirds, cardinals, eagles and ospreys, are thriving. Many others are not, including some hummingbirds, many warblers, seabirds, some ducks and birds that migrate the length of the hemisphere through a gamut of altering habitats.