Invasive Species General

Researchers with the USGS Invasive Species Program work on many species and the issues they cause: cactus moths, gypsy moths, quagga and zebra mussels, hydrilla, giant salvinia, West Nile virus, monkeypox, As
The Nonindigenous Aquatic Species Program tracks the status and distribution of introduced aquatic organisms, focusing on freshwater animals, and provides this information in a timely manner f
The wide expanses of golden annual grasslands seen in many Arizona and Nevada desert landscapes today are unnatural — the result of massive swaths of invasive, non-native brome grasses.
An invasive species is an introduced, nonnative organism (disease, parasite, plant, or animal) that begins to spread or expand its range from the site of its original introduction and that has the potential to cause harm to the environment, the economy