Magnificent and elusive, the Campephilus woodpeckers include the Ivory-billed and Imperial woodpeckers, which may be extinct, and the Pale-billed Woodpecker, which still haunt the forests of Costa Rica today. Join the experience as scientists Martjan Lammertink and Chris Saker search for this little-known species in a tropical forest, using a wooden "double-knocker" as their most valuable device.
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