Florida's ivory-billed woodpecker is officially extinct—but a few still hope

[PhysOrg]

In the Green Swamp of Polk County, Florida, Paul Sykes heard a sound that raised the hairs on the back of his neck. The sharp honk may have sounded, to a layperson, like a stepped-on squeaky toy. But to Sykes, a U.S. Fish and Wildlife Service biologist then based in Delray Beach, it sounded like the recordings he'd heard of the spectral ivory-billed woodpecker.

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