Custom Species Lists

Invasive species (those which are not native to the region and are known to cause harm) and non-native species both threaten the integrity of the Puget Sound ecosystem. Non-native species have the potential to become invasive, and preventing their introduction to the Sound is better than the costly and difficult work of removing them once they become established. Invasive species utilize resources which are vital to the survival of native species, and may outcompete or even feed on indigenous plants and animals, driving them towards extinction. Invasive species also may introduce disease and parasites, alter habitat, and breed with native species, diluting their genetic material. The Puget Sound Partnership states that aquatic nuisance species are the second greatest threat to Puget Sound biodiversity, after habitat loss.

These lists of invasive and nonnative species come from multiple sources (listed below), and are as current as possible. However, the status of these species in the Puget Sound region is subject to change, and many efforts are underway to eradicate harmful populations.

Noxious weeds in Washington State: Noxious Weed Control Board

Invasive Freshwater Species: USGS

Invasive Marine Species: National Exotic Marine and Estuarine Information System (NEMESIS)

Invasive Insects and Land Invertebrates: Looney, Chris, Eric LaGasa and Todd Murray. Exotic Pest Detection in Washington State: How Alert Citizens and Insatiable Naturalists Enhance Pest Survey. Presentation, Entomological Society of America, 2011.


Invasive species: mammals

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Utilizing double quotes for exact terms can narrow your search results. Ex. A common name search of Northwestern Sedge matches 'Northwestern Sedge' and 'Northwestern Showy Sedge'. Typing "Northwestern Sedge" return only 'Northwestern Sedge'.