Invasive species are non-native plants and animals that spread rapidly causing ecological and economic harm. Common examples are the emerald ash borer, Norway maple, and Asian clam. Invasive species are usually spread by humans. Once established, they become increasingly difficult to manage. Early detection of invasives is key to containment and practical management.
Nuisance species may be native or non-native, and may cause ecological and economic harm. Common examples are poison ivy and Canadian geese.
Common reed can rapidly form dense stands of stems which crowd out or shade native vegetation in inland and estuary wetland areas.
The Hemlock Woolly Adelgid lives and feeds on hemlock trees. Infested trees can die within 2 years, although 10-12 years is more common.
Giant hogweed is one of New York's most striking and dangerous invasive plants. Learn how to recognize and manage it safely on our site.
Last updated February 15, 2017