Are there leeches in western Washington?

Yes, there are leeches in western Washington. These freshwater organisms can be found in various aquatic environments, such as ponds, lakes, and slow-moving streams. While they are not commonly encountered, they do inhabit the region's wetlands and can sometimes be seen during warmer months. Leeches play an important role in the ecosystem by helping to control populations of small invertebrates and serving as prey for larger animals.