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US gov’t to air-drop toxic mice on Guam snakes

By Eric Talmadge

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Dead mice laced with painkillers are about to rain down on Guam’s jungle canopy. They are scientists’ prescription for a headache that has caused the tiny U.S. territory misery for more than 60 years: the brown tree snake.

Most of Guam’s native bird species are extinct because of the snake, which reached the island’s thick jungles by hitching rides from the South Pacific on U.S. military ships shortly after World War II. There may be 2 million of the reptiles on Guam now, decimating wildlife, biting residents and even knocking out electricity by slithering onto power lines.

More than 3,000 miles away, environmental officials in Hawaii have long feared a similar invasion — which in their case likely would be a “snakes on a plane” scenario. That would cost the state many vulnerable species and billions of dollars, but the risk will fall if Guam’s air-drop strategy succeeds.

“We are taking this to a new phase,” said Daniel Vice, assistant state director of U.S. Department of Agriculture’s Wildlife Services in Hawaii, Guam, and the Pacific Islands. “There really is no other place in the world with a snake problem like Guam.”

Brown tree snakes are generally a few feet (1 meter) long but can grow to be more than 10 feet (3 meters) in length. Most of Guam’s native birds were defenseless against the nocturnal, tree-based predators, and within a few decades of the reptile’s arrival, nearly all of them were wiped out.

The snakes can also climb power poles and wires, causing blackouts, or slither into homes and bite people, including babies; they use venom on their prey but it is not lethal to humans.

The infestation and the toll it has taken on native wildlife have tarnished Guam’s image as a tourism haven, though the snakes are rarely seen outside their jungle habitat.

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