Invasive Species

Invasive species are non-native plants, animals, and insects that harm human health or cause environmental or economic harm.

Some species are intentionally brought to new areas for practical purposes. Others are accidentally introduced by catching a ride on vehicles, boats, or in shipments of goods.

Outside their original habitat, these species can grow out of control due to the absence of their natural predators and constraints. This allows the invasive species to multiply quickly and harm our watershed.

The emerald ash borer (EAB) is a forest pest that infests and kills ash trees. Since its discovery in North America, EAB has killed tens of millions of ash trees. EAB was recently discovered in our region, learn how you can help find EAB.

Nutrias are large rat-like rodents that can dig up lawns, eat crops, and cause erosion along creeks, streams, and rivers.

Woody knotweeds have large roots that can damage sidewalks, building foundations, and keep other plants from growing. Areas with knotweed are also more at risk for erosion, which can harm drinking water.

Invasive Species

Invasive species are non-native plants, animals, and insects that harm human health or cause environmental or economic harm.

Some species are intentionally brought to new areas for practical purposes. Others are accidentally introduced by catching a ride on vehicles, boats, or in shipments of goods.

Outside their original habitat, these species can grow out of control due to the absence of their natural predators and constraints. This allows the invasive species to multiply quickly and harm our watershed.

Learn more:

  1. Identify and Remove Invasive Weeds
  2. Solutions for Pacific Northwest Pests + Weeds

Take action:

  1. Report Invasive Species
  2. Don't Move Firewood
  3. Stop the Spread of Invasive Species
  4. Don't Let It Loose