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We need your help to stop the spread of invasive species! Please report any new sightings of the following key invasive species. If possible, take a picture of the plant or pest and record its GPS location.

Giant African Land Snail

Lissachatina fulica

A large terrestrial snail that can reach up to 8 inches in length and nearly 5 inches in diameter. The brownish shell covers at least half the length of the snail. Damages native plants and crops. Scientists consider the giant African snail to be one...

Zebra Mussels

Dreissena polymorpha

The zebra mussel is a highly invasive, small freshwater mussel that multiplies rapidly and can cause tremendous environmental and economic damage. Their larvae are microscopic, and the adults are usually less than 1 1/2 inches long. Zebra mussels are...

Emerald Ash Borer

Agrilus planipennis

In infested areas, this beetle has killed millions of ash trees and has led to major efforts by state and local officials to limit its spread through strict quarantines and fines for the movement of wood, especially firewood, out of infested areas. T...

Giant Hogweed

Heracleum mantegazzianum

Giant Hogweed is an aggressive competitor. Because of its size and rapid growth, it out-competes native plant species, reducing the amount of suitable habitat available for wildlife. Giant Hogweed dies back during the winter months, leaving bare grou...

Cactus Moth

Cactoblastis cactorum

Cactus moth larvae live and feed communally inside the pads of prickly pear cacti. Damaged pads will show characteristic oozing of internal plant juices and insect droppings. The larvae of Cactoblastis cactorum are bright orange-red wi...

Tropical soda apple

Solanum viarum

Upright and thorny perennial shrub, 3 to 6 feet in height. Tropical soda apple is on the Federal Noxious Weed List. It reduces biological diversity in natural areas by displacing native plants and disrupting ecological integrity. This invader also se...

Asian Longhorned Beetle

Anoplophora glabripennis

This insect is a serious threat to many species of deciduous hardwood trees in the United States (e.g., maple, elm, willow, birch, horsechestnut, and poplar). During its larval stage, the ALB bores deep into a tree's heartwood, where it feeds on nutr...

Onionweed

Asphodelus fistulosis

Similar in appearance to wild onion but lacking the onion scent and taste. Found in pastures and rangeland, onionweed develops populations that exclude grasses and desirable forage species. This federally regulated weed poses a serious environmental ...

Sirex Woodwasp

Sirex noctilio

This woodwasp was introduced inadvertently into New Zealand, Australia, Uruguay, Argentina, Brazil, Chile, and South Africa. In these Southern Hemisphere countries, sirex woodwasp attacks exotic pine plantations, and it has caused up to 80 percent tr...

Tropical Spiderwort

Commelina benghalensis

Tropical spiderwort forms, dense, pure stands, smothering out other plants, especially low-growing crops. It has been reported recently as a problem in cotton in Alabama. In pastures, it grows rapidly over desirable grasses and legumes, competing wit...

Gypsy Moth

Lymantria dispar

If established in the United States, each AGM female could lay egg masses that in turn could yield hundreds of voracious caterpillars with appetites for more than 500 species of trees and shrubs. AGM defoliation would severely weaken trees and shrubs...

Cogongrass

Imperata cylindrica

Cogongrass has been ranked as one of the ten worst weeds of the world. It can invade and overtake disturbed ecosystems, forming a dense mat that makes it nearly impossible for other plants to coexist. Large infestations can alter the normal fire reg...

Brown Fir Longhorned Beetle

Callidiellum villosulum

Attacks trees in the Taxodiaceae. North American examples include the sequoia, redwood, and bald cypress. Due to the geographic isolation of some species, especially the sequoias, an infestation of these beetles could be especially dangerous. The Bro...

Giant Salvinia

Salvinia molesta

Giant salvinia is currently one of the most dangerous invasive aquatic plants in Texas. It damages aquatic ecosystems by outgrowing and replacing native plants that provide food and habitat for native animals and waterfowl.

Soapberry Borer

Agrilus prionurus

Soapberry borers are rapidly killing soapberry trees throughout their range. Infested trees can be easily recognized by the exposed sapwood that results when birds and squirrels chip off the bark to feed on the larvae. Bark chips accumulate at the ba...

Japanese climbing fern

Lygodium japonicum

Japanese climbing fern is an invasive climbing fern that is changing the landscape of East Texas. Introduced as an ornamental, it has escaped and is now rapidly spreading across the forested areas of Eastern Texas smothering native trees and shrubs....

Tawny Crazy Ant

Nylanderia fulva

Nylanderia fulva (formerly Nylanderia sp. nr. pubens) or tawny crazy ant (formerly Rasberry crazy ant) is a new exotic invasive found in Harris County in 2002 and has begun to spread largely through human assistance. If you see a lot of unifor...

Brown marmorated stink bug

Halyomorpha halys

The brown marmorated stink bug (BMSB), Halyomorpha halys, is an invasive insect that damages fruit, vegetable and ornamental crops in North America. Where BMSB becomes established, it causes severe crop and garden loses and becomes a nuisance ...


Join a Citizen Scientist Program

Working out in the field can be a very rewarding way to combat invasive species. Whether you are collecting scientific data to be used by local, state, or national agencies and organizations or actually helping get rid of the invasive plants and animals, you will be able to see up close and personal the impacts of invasive species and the results of your efforts.Go to our Citizen Scientist Page.

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