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Georgia’s Jekyll Island, once the seasonal playground of the Vanderbilts and Rockefellers, offers a refuge to the northern parula, the magnolia warbler and other birds.

The Eastern-breeding magnolia warbler, for example, spends winters in areas in the Yucatan Peninsula and Central America that are fractions of the size of its breeding range.

Breeding, migration and winter abundance of the magnolia warbler based on computer models using eBird data.

It’s a hard heart that inures to seeing a magnolia warbler, but a gray catbird changes the dynamic, cranking out its full rebuke before Sarver can even get it out of the bag.

“Magnolia warbler,” she tells a video camera set against a hole at the shed’s entrance.