Dennis Hlynsky has produced some fascinating videos showing the paths birds make. They proceed at normal speed, but the previous hundred or so frames are superimposed, creating moving lines. Recommended: starlings coming & going from wires, crows at a roost, gulls over a boardwalk, plus non-avian bonus water striders.
http://sysvision.wordpress.com/2013/12/07/index/
http://sysvision.wordpress.com/2013/12/07/index/
--Dave Nutter
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