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Files in this Data Supplement:
Diving common guillemot
This movie shows an example of the alcid dives from which estimates of speed, dive angle, flap rate and subsequent parameters were measured. The video was produced by four cameras that are routed through a video processor to create a composite image with four frames. The upper left and upper right frames are from left and right overhead cameras, respectively, and the two lower frames are from similarly arranged frontal cameras. The frontal cameras are hooded to exclude light from above the water, which provides a better underwater view. The bird begins its dive at the water’s surface at the left side of the field of view and moves to the right across all four video frames.
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