How does one monitor elusive bear populations in a rugged wilderness landscape like the North Cascades? The park's wildlife biologist demonstrates some innovative techniques that include barbed wire, fish oil, and high-tech cameras. Through this work, he and others are determining how highways may divide ecosystems and act as barriers for animals.

This film is part of the series "Science Minute Movies". To view more movies, please visit:

Executive Producers: Jerry Freilich and Michael Liang, NPS
Director, Editor, Producer: Donald Jay O'Brien
Director of Photography: Eric Rejman
Music: Thomas Owens

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