Skip to main content
Back to Show
PBS News Hour

In Oregon, Swarms of Pine Butterflies Take Toll on Forests

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.

Support Provided By
Season
May 3, 2025 - PBS News Weekend full episode
26:44
May 3, 2025 - PBS News Weekend full episode
May 2, 2025 - PBS News Hour full episode
56:45
May 2, 2025 - PBS News Hour full episode
May 1, 2025 - PBS News Hour full episode
56:42
May 1, 2025 - PBS News Hour full episode
April 30, 2025 - PBS News Hour full episode
56:44
April 30, 2025 - PBS News Hour full episode
April 29, 2025 - PBS News Hour full episode
56:45
April 29, 2025 - PBS News Hour full episode
April 28, 2025 - PBS News Hour full episode
56:45
April 28, 2025 - PBS News Hour full episode
April 27, 2025 - PBS News Weekend full episode
26:45
April 27, 2025 - PBS News Weekend full episode
April 26, 2025 - PBS News Weekend full episode
26:45
April 26, 2025 - PBS News Weekend full episode
April 25, 2025 - PBS News Hour full episode
57:46
April 25, 2025 - PBS News Hour full episode
April 24, 2025 - PBS News Hour full episode
57:46
April 24, 2025 - PBS News Hour full episode
April 23, 2025 - PBS News Hour full episode
57:46
April 23, 2025 - PBS News Hour full episode
April 22, 2025 - PBS News Hour full episode
56:44
April 22, 2025 - PBS News Hour full episode
Active loading indicator