Supplemental material for "Clear evidence for persistence of the Ivory-billed Woodpecker (Campephilus principalis)"

The movies in this data set are supplemental material for "Clear evidence for persistence of the Ivory-billed Woodpecker (Campephilus principalis)." Movies S1–S11 are based on video footage that was obtained during an encounter with a pair of Ivory-billed Woodpeckers in Florida in 2007. Movies S12–S16 were obtained at a nest of the closely-related Magellanic Woodpecker (Campephilus magellanicus) in Patagonia in 2025. The main result is Movie S12, which shows an upward swooping landing with a long vertical ascent, rotation about the axis, and landing on a surface that does not face the direction of approach. Two examples of the same flight maneuver appear in the 2007 video. This is a clear match of a remarkable behavior that cannot be attributed to any species other than the Ivory-billed Woodpecker. Movies S13–S16 show additional flights by Magellanic Woodpeckers that have characteristics consistent with flights in the 2007 video and historical accounts of the Ivory-billed Woodpecker.