9:00pm - Monday, August 17, 2026
PLUS

Description

A rare population explosion of pine butterflies fills the Malheur National Forest with a fluttering snowstorm in August. The outbreak may occur for two to three years - with the caterpillars eating needles off 250,000 acres of trees - then disappear for up to three decades.

Broadcast In: English Duration: 0:28:30
HD CC

Additional Airings

1:00am, 08/18/2026 | PLUS
2:00pm, 08/22/2026 | PLUS
4:00am, 08/23/2026 | PLUS
10:00am, 08/23/2026 | PLUS

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