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Red alder, a deciduous species that often grows in disturbed areas. Photo copyright King County.

King County lowland habitat

The history of land use in King County has produced a lowland and foothill landscape of bewildering variety. The once continuous forest of western hemlock, Douglas-fir, and redcedar has given way to a patchwork of lawns, parks, playgrounds, woodlots, greenbelts, old fields, croplands, tree farms, and remnant forests set amid a landscape of urban, suburban, rural, and commercial uses, all joined

Canada geese, commonly seen in Lake Washington. Photo by Jennifer Vanderhoof.

King County lake habitat

The natural biodiversity of the lakes of King County is strongly influenced by geography. The county runs from the Cascade mountain crest to the shores of Puget Sound, covering all three different Level III ecoregions (Puget Lowland, North Cascade, and Cascade). The geology, elevation, climate, and ecology in these three ecoregions are all different, and these differences in environmental factors

Aerial view of the Vashon Island shoreline.

The Puget Lowland ecoregion

Ecoregions provide a useful framework and background for the discussion of marine, freshwater, and terrestrial environs of the county. The discussion of ecoregions is based on U.S. Environmental Protection Agency (EPA) ecoregion conventions, which result in units similar to European biogeographical regions because they denote areas of general similarity in ecosystems.

King County map, showing incorporated land and major water bodies. Copyright King County.

The North Cascades ecoregion

Ecoregions provide a useful framework and background for the discussion of marine, freshwater, and terrestrial environs of the county. The discussion of ecoregions is based on U.S. Environmental Protection Agency (EPA) ecoregion conventions, which result in units similar to European biogeographical regions because they denote areas of general similarity in ecosystems.

King County map, showing incorporated land and major water bodies. Copyright King County.

The Cascades ecoregion

Ecoregions provide a useful framework and background for the discussion of marine, freshwater, and terrestrial environs of the county. The discussion of ecoregions is based on U.S. Environmental Protection Agency (EPA) ecoregion conventions, which result in units similar to European biogeographical regions because they denote areas of general similarity in ecosystems.

Download EoPS ringtones

Puget Sound is calling: EoPS now has custom ringtones. Add the sounds of Puget Sound-area species like the Rhinoceros Auklet or Pacific Chorus Frog to your phone today.

Eyes Over Puget Sound: Surface Conditions Report - June 12, 2012

Eyes Over Puget Sound: Surface Conditions Report - June 12, 2012

Cool weather and river flows above normal. A bonanza of red-orange Noctiluca streaks in Central Basin with reduced fluorescence south of Edmonds. Strong red-brown bloom in Case Inlet. Higher DO levels in Whidbey Basin surface water. Oil sheen in Sinclair Inlet.
Interesection of NW GAP Hydrological Units and Puget Sound WRIAs

Puget Sound terrestrial vertebrates

The Encyclopedia of Puget Sound, in cooperation with the USGS, has developed a list of terrestrial vertebrates occurring within the Puget Sound basin.

Adult female Rana aurora during fall migration of 2005 in Puget Sound (Hayes, Marc 2005).

Red-legged frogs in the Puget Sound watershed

The Northern Red-legged Frog is described here relative to its local behavior, habitat, threats and morphology.

2010 Census Quick Facts for Whatcom County, WA

Learn more about demographics in Whatcom County, Washington.  The U.S. Census Bureau published the following quick facts.