Extraterrestrial Invaders

May 8, 2014

Three new scientific papers examine the risk of organisms native to Earth hitching a ride to another planet. Read more here.

Full article

Snakeheads on the Potomac

April 26, 2014

April in DC. It means cherry blossoms for many and the start of northern snakehead season for a few. Fly fisherman and archer Austin Murphy recounts his efforts to catch the snakehead in the nation’s capital river. Northern snakeheads were first discovered in the Potomac River in 2004. I saw my first snakehead swimming in [...]

Full article


April 4, 2014

Some say it started in 1992 in Miami when Hurricane Andrew smashed an aquarium tank. Don’t blame the weather, others say; in the mid-nineties, disappointed yet softhearted hobbyists…

Full article

Invasive Cuisine

April 2, 2014

Joe Roman talks with Jane Lindholm of Vermont Public Radio about his mission to change what’s on our dinner plates. Listen here.

Full article

The Gourmet Invasivore’s Dilemma

March 30, 2014

“The invasivore movement has caught fire. Some of the worst invaders, like gypsy moths and Asian long-horned beetles, will not grace lunch counters anytime soon, yet where perniciousness meets deliciousness, there is hope.” Rowan Jacobsen writes about Bun Lai and Joe Roman in April’s Outside Magazine.

Full article

New Green Crab Fishery in Canada

March 23, 2014

Fisheries and Oceans Canada wants to create a commercial green crab fishery on Prince Edward Island. Read more about it here.

Full article

Invader vs. Invader

February 17, 2014

Crazy ants may soon displace fire ants from much of the southeastern U.S. and become the new ecologically dominant invasive ant species. Read more here.

Full article

Eat the Invaders in Brazil

February 9, 2014

Fala portugués? Eat the Invaders has been covered by Brazil’s Época magazine. Roast capybara, anyone? Coma as Invasores

Full article

Asian Carp at the Doorstep of Great Lakes

January 7, 2014

The Asian carp could devastate native species and local fisheries in the Great Lakes. Can the Army Corps of Engineers and regional managers stop this invasion. David Schaper provides an update on NPR.

Full article

Cows Eat Weeds, Too

November 18, 2013

It’s not only humans that can develop an appetite for invaders. Kathy Voth, founder of Livestock for Landscapes, has helped farmers control invasive weeds on their land by training cows to eat invasive multiflora rose. The cows are fed the roses, until they develop a taste for it. Says one farmer: “the cows ate all [...]

Full article


Screen Shot 2012-11-18 at 8.02.21 AM

Blue Plate Special: Sow Thistle

It’s spring and time to weed. Sow thistle is a delicious invader found throughout the continent.


Lamb’s Quarters

Lamb’s quarters was a popular spring tonic in the South—an early season edible green—but its leaves are good throughout the summer.       Chenopodium album Native range: Described by Linnaeus in 1753, this European native has been transferred throughout much of the world. Because its spread was rarely recorded, C. album‘s native and invasive [...]


Wild Fennel

  Foeniculum vulgare Native range: Mediterranean, from Turkey west to Spain and Morocco Invasive range: Much of North and South America, South Africa, and parts of Oceania and the British Isles. Check out the USDA Plants Database to see if it’s found near you. Habitat: Roadsides, pastures, along the edge of wild habitats. Rocky shores [...]


Garlic Mustard

  Alliaria petiolata Native range: Europe, Asia, Northwest Africa Invasive range: Much of the Lower 48, Alaska, and Canada. (See map.) Habitat: Moist, shaded soil of floodplains, forests, roadsides, edges of woods, and forest openings. Often dominant in disturbed areas. Description: Biennial herb. First-year plant has a rosette of green leaves close to the ground. [...]


Wild Boar

Did the domestic ancestors of today’s feral pigs streak off De Soto’s ship into the Florida scrub of their own accord in 1539? Or did they have to be urged to go find something to eat? All you need to…



Pterois volitans


Some say it started in 1992 in Miami when Hurricane Andrew smashed an aquarium tank. Don’t blame the weather, others say; in the mid-nineties, disappointed yet softhearted hobbyists…

chuka wakame


  Undaria pinnatifida Native range: Japan Sea Invasive range: Southern California, San Francisco Bay, New Zealand, Australia, Europe, Argentina Habitat: Opportunistic seaweed, can be found on hard substrates including rocky reefs, pylons, buoys, boat hulls, and abalone and bivalve shells. Description: Golden brown seaweed, growing up to nine feet. Forms thick canopy. Reproductive sporophyll in [...]


Asian Shore Crab

The first sighting of the Asian shore crab in the United States was at Townsend Inlet, Cape May County, New Jersey, in 1988. Though the source is unknown . . .



The common periwinkle, which first appeared in New England in the 1860s, is now found along the coast wherever there’s hard substrate–rocks, riprap, broken concrete, or docks–from Labrador to . . .


Green Crab

Since the green crab was first recorded off southern Massachusetts in 1817, it has been hard to ignore. A few minutes of rock-flipping in Maine can turn up dozens of them, brandishing their claws as they retreat…




Red Swamp Crayfish

  Procambarus clarkii Native range: Red Swamp Crayfish, also known as Louisiana Crayfish, Crawdad, and Mudbug, is native to the south central United States and northeastern Mexico. Invasive range: Widely introduced throughout the United States including Arizona, California, Georgia, Hawaii, Idaho, Indiana, Maryland, North Carolina, Nevada, Ohio, Oregon, South Carolina, Utah, and Virginia. Populations have [...]

Distinguishing _ Channa argus

Northern Snakehead

His sister was ailing, and the man in Maryland remembered that, back home in Hong Kong, there was a fish that was considered a delicacy and a restorative. He would make a fish soup…



“They live in a wide variety of habitats, colonize new ones readily, and eat everything that fits into their mouths,” says Dr. Peter Moyle of the Center for Watershed Sciences at UC-Davis…



Nutria, also known as coypu and river rat, is native to temperate and subtropical South America. It has been introduced to Europe, Asia, and Africa, mainly for fur farming. These voracious. . .

Picture 1

Common Carp

For a bottom-feeder, what is the good life? The common carp isn’t very demanding: any body of water that’s sluggish and murky will do. One catching sewage or…


Field Notes


Harvest the Invaders: Incentives to Control Invasive Species

Biologists Susan Pasko and Jason Goldberg discuss harvesting invaders in a new paper in Management of Biological Invasions. Incentive programs, such as bounties and encouraging recreational harvests, appear to be appropriate for certain species and regions. Among the many benefits is the development of an outreach program. “By engaging the public and encouraging harvest,” the [...]


An App to Find Nemo

“Creating a consumer market for invasive species is one of the most successful ways of combatting them. Like cupcakes or artisanal pickles, it can take a lot of marketing and hype to create a demand that matches the supply. The Connecticut chef Bun Lai’s invasive-species menu, which Elizabeth Kolbert wrote about in 2012, includes lionfish [...]


Hunting for Alien Bug and Seed Invaders at Baltimore’s Port

The fight against invaders starts at seaports and airports across the world. Listen to the NPR story here.

Screenshot 2014-05-21 20.35.10

Attack of the Green Crabs

Green crabs on the move in Maine and the Maritimes. Watch the movie here.

Screenshot 2014-05-16 10.46.39

Clean Boats, Clean Tournaments

Help stop the spread of invasive species.


“Anything that eats has a system of organizing the world.”

Mark Dion, artist, New York Times, April 1, 2012