In Oregon, Rare 'Snowstorm' of Pine Butterflies Takes Toll on Forests
4,605 views · Published 13 March 2012 · 6:45 · Indexed 28 September 2026
Channel: PBS NewsHour · 2012 · News & Politics
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.
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