For more information:

"The Silent Invasion," National Wildlife Refuge Association

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A Silent Invasion

An advocacy group for the nation's wildlife refuge system says invasive species are wreaking havoc on refuge lands around the country. And the problem in Florida is especially serious, with invasives showing up here in record numbers and taking advantage of the climate and growing season. Evan Hirsche is president of the National Wildlife Refuge Association...

An advocacy group for the nation's wildlife refuge system says invasive species are responsible for $100 billion dollars a year in damages to native ecosystems. From a report, his group calls "The Silent Invasion," National Wildlife Refuge Association president Evan Hirsche defines the threat...

To draw attention to what they say is a crisis with invasive species, an advocacy group for the nation's wildlife refuge system has developed a dirty dozen list of plant and animal invaders, along with a dozen refuges that are facing threats. Evan Hirsche is president of the National Wildlife Refuge Association...

Volunteers and a strike force of experts are part of what's needed to fight invasive plants and animals in the U.S., according to the National Wildlife Refuge Association, a refuge advocacy group. It's president is Evan Hirsche...

From Melaleuca trees to the Old World Climbing Fern, Florida has hundreds of invasive species that serve as threat to native plants and animals. An advocacy group for the nation's wildlife refuge system points out exotics as perhaps the systems greatest challenge. Evan Hirsche is president of the National Wildlife Refuge Association...