LEO Network

Tiny insects ate the needles off a half million acres of Tongass hemlocks. Most of the trees will be fine.

Juneau, Alaska, United States

Dead crowns in the canopy and rusty-colored branches are woven in with the otherwise healthy, green temperate rainforest. About a third of the trees around here were hit by the voracious sawfly. The larvae get mistaken for caterpillars. Adults are a kind of non-stinging wasp, a little smaller than a pinky finger.

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