Useful Definitions

Below are some useful definitions to remember:

Native Species: Historically found in an area. Example in the Adirondacks: purple trillium

Purple Trillium

Non-native Species: Introduced from somewhere else. Example in the Adirondacks: California poppy

California Poppy

Invasive Species: Non-native and causes measurable harm to the environment, economy, or human health. Example in the Adirondacks: Japanese knotweed

Photo by Paul Rischmiller

Nuisance Species: Interferes with human activity. Example in the Adirondacks: dandelion

Dandelion

It is important to remember that not all non-native species are invasive. Non-native species are only considered invasive if they are causing measurable harm to the environment, economy, or human health. Both native and non-native species can be considered a nuisance if they are interfering with human activity.