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Emerald Ash Borer

(Richard Horwitz, a senior biologist with the Academy of Natural Sciences, holds a northern snakehead fish specimen that was found in FDR Park, South Philadelphia, in July 2004.  The northern snakehead can grow to several feet in size, crawl on land for short distances, and is native to Asia and Africa.  Credit: William Thomas Cain/ Getty Images)

Voracious ‘Frankenfish’ Spotted in Heinz Wildlife Refuge, Delaware County

The northern snakehead, a predatory fish from China, has been caught at the John Heinz National Wildlife Refuge in Tinicum Township.

03/26/2012

(File photo.  USDA)

Infestation of Beetle Deadly to Ash Trees Discovered In Bucks County

The emerald ash borer — a pretty, iridescent green beetle that has already killed millions of ash trees worldwide — has been discovered in Bucks County, Pa.

03/19/2012

(credit:  Phran Novelli)

Stink Bugs Stink

Next time you’re grossed out by a stink bug, let it be a potent reminder of how important it is to keep alien species from invading the US.

10/18/2011