Eating Invasives: Delicious or Dangerous?

By Matt Miller, The Nature Conservancy

Warm spring days evoke a strong memory of my grandmother. She’s hunched over the yard, seemingly picking randomly at the grass. Her short stature and rapid movements give the appearance of a dervish. She grips at a plant, plucks and plops it into the bucket, then moves a short distance away to resume her harvest.

My grandmother collected dandelions, a spring bounty she served with a bacon dressing. The bitter greens were not unlike spinach or kale, bitter yet tasty. My grandfather used the flowers to make a potent wine.

This time of year, I so often encounter dandelions shriveled from hefty doses of herbicide. Recalling my grandmother, it seems a waste: here are delicious, nutritious greens that could be providing some free meals. Instead, they’ve become toxic reminders of the so-called “war on weeds“—the scorched earth approach to invasive control favored by both surburban lawn owners and conservationists.

Why aren’t we instead looking at some non-native, invasive species as a sustainable source for fresh, local food?

The idea is popular. Books like Jackson Landers‘ upcoming Eating Aliens encourage local foodies to eat such invasives as iguanas and nutrias. Marine conservationists have launched campaigns to encourage restaurants to carry lionfish, a species devastating coral reefs. Even governments have urged their citizens to eat non-native gray squirrels (in Britain) and camels (in Australia).

As history shows, people can certainly eat their way through populations of species. As such, eating invasives doesn’t only provide good food, it’s good conservation.

Or is it?

An upcoming paper by ecologist Martin Nunez and others to be published in Conservation Letters, the journal of the Society of Conservation Biology, encourages skepticism to this approach. In the paper, they argue that encouraging people to eat invasives may have unintended consequences. There’s a real risk, the authors argue, that people will start actually liking said invasives.

Entrepreneurs could develop markets for them; hunters could enjoy pursuing them. Invasives could become a part of the local culture. As a review in Conservation Magazine points out, native Hawaiians often oppose eradication measures for non-native pigs because pig hunting and eating is so clearly linked to their culture.

I can relate: On a recent weekend, my friends and organic gardeners Clay and Josie Erskine asked me to their farm to hunt the non-native (in Idaho) wild turkeys that had begun raiding their gardens. As we looked across their farm, ring-necked pheasants ran from the kale patch. Valley quail called from literally every corner of the property.

“Every one of them is a non-native species,” Josie sighed. “And they’re all absolutely devastating to vegetable farmers like us.”

Non-native quail, pheasants and turkeys have a constituency, though. Membership organizations advocate for their conservation. Landowners can receive government funding for practices that largely benefit these birds.

I reluctantly admit, as a non-native gamebird hunter, I would oppose any effort to eliminate these species.

Could campaigns to eat kudzu or camels or carp actually have the reverse effect? Could such campaigns lead to people protecting or spreading them?

It bears serious thought.

The risks need to be recognized. So, too, do the benefits.

Intensive invasive species control poses risks of its own. With its war metaphors and scorched earth campaigns, invasives eradication often requires hefty doses of toxic chemicals. And just as often, weeds or invasive animals still flourish. Aside from cases on small islands such as Santa Cruz, complete eradication is usually impossible.

Recognizing dandelions as a food source will not eradicate the plant. But spraying dandelions doesn’t, either.

In many ways, eating invasives is not a control measure so much as it is a new way of interacting with non-native species. Through eating them, they become part of our environment rather than “enemies.” And because they’re prolific and abundant, they make ideal sustainable, low-carbon, local food sources.

Despite our best efforts, invasive species already thrive in our midst. Is serving them for dinner really going to make them even more prevalent?

Doubtful. These species are here to stay. It’s time to recognize them as a truly sustainable and abundant food source. I’ll take the fried iguana served over a bed of dandelion greens, please.

Matt Miller is a senior science writer for The Nature Conservancy. He writes features and blogs about the conservation research being conducted by the Conservancy’s 550 scientists. Matt previously worked for nearly 11 years as director of communications for the Conservancy’s Idaho program. He serves on the national board of directors of the Outdoor Writers Association of America. An avid naturalist and outdoorsman, Matt has traveled the world in search of wildlife and stories.

[Image: Iguanas, an invasive species in places like Florida, are becoming a menu item for local foodies. Image source: Matt Miller/TNC]

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Shirley Spycalla
Shirley Spycalla2 years ago

Here on Montserrat (Caribbean), we attended a workshop on the pros and cons of the Lion Fish, a purely invasive and poisonous fish currently destroying reefs up and down the east coast of the US and throughout the Caribbean.
They propagate at an enormous speed (5,000 eggs every three days). Their spines are poisonous. However, caught and handled carefully, they can be made into fantastic fish cakes. There were some made for all of us to taste. Now if only reps from the hotels and restaurants were at the workshop, and if only the fishers would stop throwing them back into the sea when the fish are trapped in their fish pots. Left alone, the Lion Fish are killing all the reef fish. The answer? Eat 'em!

Kathleen Cazander

Interesting points. Thanks.

Dale Overall

Eating invasive non native species sounds intriguing. Saute Purple Loosestrife in unsalted butter perhaps? Pretty to look at but they chock off native plants in the wetlands. Sadly, I image the colourful loosestrife is likely not nutritious and maybe poisonous. Can be medicinal for sores according to medicinal lore but haven't seen it on the shelves. Even the wildlife in Canada won't eat it, except a few non native beetles.

No iguana's trek around as the cold in the winter would kill them off, dandelions and the like are tasty if not sprayed with toxins. Not everyone is a vegetarian, many are omnivores and while one says if we don't like invasive species then one can move, hardly workable. No pythons lurk here, too cold.

Some are areas of the world eat rats as meat...prices too high for regular meat. Ouch!

Meat eaters will always eat meat, others will stick to plant life. People do what suits their lifestyle. When Mother Nature redesigns life on Earth to consume rock pate and not living organisms be it plant or animals then we can dine on the non living and not judge the diet of others.

Kathy Perez
Kathy Johnson3 years ago


Carrie Anne Brown

thanks for sharing

Deborah F.
Deborah F.3 years ago

I love dandelion greens and agree that it is such a waste to destroy them with toxins. But you have to get permissions to harvest them and not all homeowners are going to let you onto their property.

Christine C.
Christine C.3 years ago


Mary Bunker
Mary Bunker3 years ago

Hi glaikit,

I loved the Gibnut story.

La Loba L.
La Loba L.3 years ago

Heidi A. where on earth did you get the notion that Tilapia is a form of Carp??

Carp are various species of oily freshwater fish of the family Cyprinidae.

Tilapia is the common name for nearly a hundred species of cichlid fish from the tilapiine cichlid tribe.

Please note they are from different species completely.

Riccardo Pelizzo
3 years ago

this is a very smart piece