First Snakes, Now Spiders Take Over Guam

Tree snakes devoured most of the spider-eating birds

By Dustin Lushing,  Newser Staff

Posted Sep 14, 2012 5:13 PM CDT

(Newser) – First it was two million snakes. Now spiders are taking over Guam. The tiny island is experiencing a population explosion of arachnids because a vast, invasive army of snakes ate most of the native birds, the spiders' natural predator. Biologists say Guam's jungle currently holds 40 times more spiders than are found on nearby islands. "You can't walk without a stick in your hand to knock down the spiderwebs," says a researcher.

The brown tree snake was originally transported to Guam during World War II, and now millions slither through its terrain. The reptile horde has eaten out of existence 10 of Guam's 12 native bird species. "There's no other place you can look to see what happens when birds are removed over an entire landscape," said a scientist. "Any time you have a reduction in insectivorous birds, the system will probably respond with an increase in spiders."

A brown treesnake slithering in Guam.
A brown treesnake slithering in Guam.   (AP Photo/US Fish and Wildlife Service, Gordon Roda, File)
The spider population in Guam is 40 times bigger than nearby islands.
The spider population in Guam is 40 times bigger than nearby islands.   (Shutterstock)
« Prev« Prev | Next »Next » Slideshow
My TakeCLICK BELOW TO VOTE
3%
11%
11%
17%
2%
57%
To report an error on this story, notify our editors.

NEWS FROM OUR PARTNERS
Other Sites We Like:   The Street   |   MSN Living   |   PopSugar Tech   |   RealClear   |   24/7 Wall St.   |   Biography   |   Barstool Sports   |   OK!