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On the asphalt of a sun-soaked parking lot, he placed a mottled black beetle on a pillow of dirt and had a colleague run it over with a Toyota Camry.

When entomologists first told Jesus Rivera that a nondescript black beetle could survive being run over by a car, he was skeptical.

In the 1990s, investigators in British Columbia in Canada found that a black beetle named Laricobius nigrinus, about the size of a grain of rice, munches on adelgid eggs, larvae, and nymphs.

At one point, I spotted a fat, several-inch-long black beetle that sent me running.

Experts say the shiny black beetle, the Tomicus Piniperda, is having a devastating effect on trees in the Seih Sou forest in the hills overlooking Thessaloniki, Greece’s second largest city.