ALT Spotted knapweed is an invasive plant that forms dense stands, decreasing native vegetation and degrading forage quality for wildlife. Efforts are underway to limit impacts and prevent the spread of knapweed and other invasive plants. Photo by Bureau of Land Management.

ALT Silver carp jumping during electrofishing in the Fox River. Photo by R. Hagerty, U.S Fish and Wildlife Service.

ALT The quagga mussel is an invasive species that poses a substantial threat to water resources. Photo by S. Pucherelli, Bureau of Reclamation.

ALT A spotted lanternfly sits on a branch next to another spotted lanternfly with white spots on its red body and black legs. Photo by USDA.