Invasives are species that are not native to an area. When introduced these species cause economical, environmental, or human health problems. These non-native plants are listed as one of the greatest threats to wildlife in the DC Wildlife Action Plan. Invasive species can invade an area, outcompeting native species for precious nutrients, water and light. These foreign species provide a different habitat than what native wildlife have evolved with. A few government agencies (National Park Service, US National Arboretum, and DC Fisheries and Wildlife Division) and non-profit organizations (Anacostia Watershed Society and DC Woodlands) are banning together to control invasive plant species in the District. Since plants know no property boundaries these groups are identifying where invasive species exist or where suitable growing conditions are both within and beyond their respective boundaries. Some of the species these groups are finding include, garlic mustard, phragmites, lesser celandine, and tree of heaven. The next step will be for these groups to treat invasive plants, revegetate the treated areas, and conduct pre- and post-treatment wildlife surveys. Trained staff will treat areas using chemical methods and volunteers will use mechanical methods. If you or your organization are interested in controlling invasive plant species in the District contact Damien Ossi at 202-741-0840 or damien.ossi@dc.gov.