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Updated 1/28/10 -------------------------------------------------------- National park battling infestation of hogs The Associated Press KNOXVILLE, Tenn. -- National park biologists are trying to come to grips with a hog infestation in the Great Smoky Mountains National Park. In 2009, the park's hog team removed 620 wild hogs, the third highest since the hog control program started in the late 1950s. Biologists say the hog population spiked last year because of a bountiful mast crop that enabled the sows to produce more than one litter. Park biologist Bill Stiver told the Knoxville News-Sentinel the introduction of wild, semi-domesticated hogs into the park has made hog control even more difficult. "The speculation is that hunters are illegally releasing feral pigs that eventually make their way inside the park," Stiver said. "It's a major problem not just here, but all over North America." He said numerous hogs killed this year had spotted markings and curl...

Updated 3/20 -------------------------------------------------------- Vitex eradication effort gains traction Group tallies past year's accomplishments By Gareth McGrath, StarNewsOnline.com Fort Fisher, North Carolina - The invasive plant has been discovered in Virginia and in places in North Carolina thought to be vitex-free. But that's not necessarily a bad thing, since it shows that the educational and outreach efforts of the Carolinas Beach Vitex Task Force about the menace posed by the foreign invader are working. It also shows, however, that there's a lot of work to do to eradicate the shrub. It is native to the Pacific Rim and was once viewed as the savior of the coast, but it's turned out to be a huge biological menace. On Friday members of the task force gathered at the N.C. Aquarium at Fort Fisher to celebrate the past year's successes and discuss the remaining challenges facing the multi-state effort to eradicate beach vitex. Among the 2008 accomplishment...

Updated 2/12 Exotic fish pose threat to native species in Everglades By Curtis Morgan, Miami Herald The small pond six miles deep in Everglades National Park suddenly began bubbling like a pot aboil -- a telltale sign of air-slurping walking catfish. Dave Hallac, the park's chief biologist, dipped a net into the muddy commotion and hauled up a mess of wriggling slime so hefty it surprised even him. He counted out 56 fish from a single scoop. Walking catfish, along with other species originally imported for somebody's tank or table, outnumbered natives in this shallow, shady bayhead by an unhealthy margin. Unlike giant python, the Glades' most notorious invader, these dinky denizens don't draw attention to their presence by, say, swallowing an alligator and exploding. But for park scientists, their spread is no small concern. ''This is a problem that is 10 times worse than the python, but it's all under water, so nobody knows about it,'' Hallac said. ...