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Feds to air-drop toxic mice onto Guam jungles

By Eric Talmadge

Associated Press

LAST UPDATED: 02:25 p.m. HST, Feb 22, 2013

ANDERSEN AIR FORCE BASE, Guam » 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, Hawaii environmental officials 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 long but can grow to be more than 10 feet 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.

The solution to this headache, fittingly enough, is acetaminophen, the active ingredient in painkillers including Tylenol.

The strategy takes advantage of the snake's two big weaknesses. Unlike most snakes, brown tree snakes are happy to eat prey they didn't kill themselves, and they are highly vulnerable to acetaminophen, which is harmless to humans.

The upcoming mice drop is targeted to hit snakes near Guam's sprawling Andersen Air Force Base, which is surrounded by heavy foliage and if compromised would offer the snakes a potential ticket off the island. Using helicopters, the dead neonatal mice will be dropped by hand, one by one.

U.S. government scientists have been perfecting the mice-drop strategy for more than a decade with support from the Department of Defense and the Department of the Interior.

To keep the mice bait from dropping all the way to the ground, where it could be eaten by other animals or attract insects as they rot, researchers have developed a flotation device with streamers designed to catch in the branches of the forest foliage, where the snakes live and feed.

Experts say the impact on other species will be minimal, particularly since the snakes have themselves wiped out the birds that might have been most at risk.

"One concern was that crows may eat mice with the toxicant," said William Pitt, of the U.S. National Wildlife Research Center's Hawaii Field Station. "However, there are no longer wild crows on Guam. We will continue to refine methods to increase efficiency and limit any potential non-target hazards."

The mouse drop is set to start in April or May.

Vice said the goal is not to eradicate the snakes, but to control and contain them. Just as the snakes found their way to Guam, they could stow away on a ship, or more likely the cargo hold of an airplane, and begin breeding on other islands around the Pacific or even the U.S. West Coast.

That "snakes on a plane" scenario has officials in Hawaii on edge. The islands of Hawaii, like Guam, lack the predators that could keep a brown tree snake population in check.

Native Hawaiian birds "literally don't know what to do when they see a snake coming," said Christy Martin, a spokeswoman for the Coordinating Group on Alien Pest Species, a partnership of Hawaii government agencies and private organizations.

A 2010 study conducted by the National Wildlife Research Center found brown tree snakes would cause between $593 million and $2.14 billion in economic damage each year if they became established in Hawaii like they are on Guam. Power outages would cause the most damage, followed by a projected decline in tourism. The cost of treating snake bites would account for a small share.

"Once we get snakes here, we're never going to be able to fix the situation," Martin said.

Though the snakes are native to Australia and Papua New Guinea, Guam is much closer to Hawaii and its snake population is much more dense, meaning it is the primary threat for snake stowaways.

So far, Guam's containment seems to be working. Only a few brown tree snakes have ever been found in Hawaii, and none over the past 17 years.

"If we continue doing what we are doing, the chance of success is very high," Vice said. "If what we are doing stops, I think the possibility of the snakes getting to Hawaii is inevitable."

AP writer Audrey McAvoy contributed to this report from Honolulu, Hawaii.

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808warriorfan wrote:
Interesting idea...hope it works...they'll need a lot and I mean a lot of mice
on February 22,2013 | 07:07AM
mijlive wrote:
maybe we could add some of our toxic politicians to the mix--yum
on February 22,2013 | 07:18AM
copperwire9 wrote:
That's a disgusting and completely inappropriate thing to say.
on February 22,2013 | 07:33AM
dontbelieveinmyths wrote:
I agree. The snakes wouldn't want to eat those disgusting politicians.
on February 22,2013 | 10:23AM
Kate53 wrote:
They're way too big. We need them to get rid of the pythons in Florida!
on February 22,2013 | 07:56AM
cojef wrote:
Vermins or varmints stoways, you all don't need them in Hawaii for sure. Appears they multiply fast, just like the bufo-marino(sic) toads that were imported by the plantations on Kauai during the time of my youth. Squish, swash are the sounds you heard as you drove over them at night. In the morn all you see flat remains on the black-top. Then the dried up remains later on.
on February 22,2013 | 07:20AM
all_fed_up wrote:
Wait till PETA hears about this. And ACLU too.
on February 22,2013 | 08:39AM
Hapa_Haole_Boy wrote:
Godspeed to Guam, hope this works, for their sake and ours.
on February 22,2013 | 08:52AM
justin_thyme wrote:
Sloppy reporting by the AP: this story includes the comment, "Unlike most snakes, brown tree snakes are happy to eat prey they didn't kill themselves, and they are highly vulnerable to acetaminophen, which is harmless to humans." Acetaminophen (Tylenol) isn't "harmless" -- it is only safe for humans IN CONTROLLED DOSAGE. Overdoses, or usual doses along with alcohol consumption, is a leading cause of death from liver failure.
on February 22,2013 | 09:36AM
dontbelieveinmyths wrote:
Nothing is harmless if you over do it. Can you be any pickier?
on February 22,2013 | 10:24AM
Maneki_Neko wrote:
So if you know a snake has been fed acetaminophen, only eat one or two of them.
on February 22,2013 | 06:21PM
sailfish1 wrote:
"U.S. government scientists have been perfecting the mice-drop strategy for more than a decade with support from the Department of Defense and the Department of the Interior." More than a decade? If it was a private company doing this, they would have gone out of business after 6 months. Only in government service does the same work go on and on for a decade.
on February 22,2013 | 10:11AM
hilopango wrote:
My thoughts exactly...how long does it take to learn how to drop a mouse? Even if it had to be precise, it shouldn't have taken anyone a DECADE!
on February 22,2013 | 11:01AM
TLehel wrote:
Freaking brilliant idea. Bravo. I'm excited to see how this develops.
on February 22,2013 | 10:37AM
hilopango wrote:
Now let's find a way to do something similar for the coqui frogs!!!!
on February 22,2013 | 11:02AM
joshislost wrote:
I was thinking we drop some toxic beetle nut in kalihi anyone agree??
on February 22,2013 | 08:59PM
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