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In Photos: Thousands of Goldfish Swarm in Colorado LakeThousands of goldfish were spotted in March in Teller Lake #5 off Arapahoe Road in Boulder, Colorado, and biologists are concerned. Here's a look at the fish-filled lake.
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Fire Ants Hitched Ride Around Globe on 16th-Century Ships -
Killer Shrimp Could Invade the Great LakesKiller shrimp, creatures that indiscriminately slay other animals without eating them, may soon join the list of invasive species living in the Great Lakes, a new study finds.
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When You Stray From a Trail, Invasive Species FollowOpinion Straying from the trail, hikers can spread invasive species deep into the woods.
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Near-Extinct Galápagos Island Tortoises Make Colossal ComebackOnce down to only 15 animals, giant tortoises on Espãnola, a tiny Galápagos island, now number about 1,000, making the reptile one of conservation's greatest success stories.
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Suspenseful Video: Alligator Attacks Scaredy CatAn amazing video from the Florida Keys shows a curious domestic cat nearly become a midnight snack for an American alligator.
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Invasive Camel Crickets Widespread in US HomesAn invasive species of camel cricket from Asia is now far more common in American basements than the native variety, a citizen science project found.
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Lionfish's Terminator-Style Killing Alarms ScientistsWhen other predatory fish quit stalking their prey to look for easier targets, lionfish just keep on killing.
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Chomping Invaders! Alien Trap-Jaw Ants Spread Along Gulf Coast
