In Oregon, Swarms of Pine Butterflies Take Toll on Forests

Name: In Oregon, Swarms of Pine Butterflies Take Toll on Forests
Uploaded: 2012-03-12T22:00:00Z
Duration: P404S
Description: In Oregon's Malheur National Forest, pine butterflies experience a population explosion for two to three years every three decades. Oregon Public Broadcasting's Oregon Field Guide series explores the snowstorm-like population surge that has stripped needles from 250,000 acres of trees.

Clip: 03/12/2012 | 6m 44s

In Oregon's Malheur National Forest, pine butterflies experience a population explosion for two to three years every three decades. Oregon Public Broadcasting's Oregon Field Guide series explores the snowstorm-like population surge that has stripped needles from 250,000 acres of trees.

Aired: 03/12/12

Rating: NR

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Major corporate funding for the PBS NewsHour is provided by BDO, BNSF, Consumer Cellular, American Cruise Lines, and Raymond James. Funding for the PBS NewsHour Weekend is provided by Consumer Cellular and American Cruise Lines. For a complete list of funders for the PBS NewsHour and PBS NewsHour weekend, click here.

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In Oregon, Swarms of Pine Butterflies Take Toll on Forests

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