National parks
52 parks
The National Park Service reports invasive plant species in 52 park units and more than 1.4 million infested acres.
View sourceMake invasive species informationunderstandable, local, and usefulto protect ecosystems across the USA
Invasive Species in the USA(Is it USA?) turns county-level data into a map people can actually use.Instead of forcing people through scattered PDFs, agency pages, or state lists, the project enablesinvasive species detection & mitigation for the people who live, work, hike, fish, farm, and restore.
Habitat competition
Early detection matters
NPS emphasizes that invasive species often outcompete native species and destroy habitat, which is why early detection and rapid response matters.
View sourceAgriculture and forests
High-risk systems
USDA identifies invasive pests and weeds as a direct threat to crops, forests, grazing systems, and plant trade pathways.
View sourceWaterways and fisheries
Rapid spread
USFWS highlights how invasive aquatic plants and animals can disrupt food webs, water access, and habitat quality when they spread between waters.
View sourceData foundation
The species catalog is based on the U.S. Register of Introduced and Invasive Species (US-RIIS). The map starts from a stored county snapshot dated July 11, 2026, using EDDMapS and USGS NAS records. Reviewed county research also contributes to the Alabama map. Map counts and national research coverage can therefore differ.
County research covers all 50 states and the District of Columbia, using registered sources including agency surveys and museum specimens. Each state and county view shows its assessment date, evidence, and source links. Research releases are updated separately from the map, and many county-species pairs remain unresolved.
A recorded occurrence may be historical and does not by itself establish that a species is present today. Missing records do not establish absence. Official absence and eradication findings retain their geographic and time scope.