The drake wood duck is the most colorful of North American ducks. The brown hen has similar features including a crest, distinctive white eye-ring, white belly and purplish-blue iridescence on wing coverts and speculum. Both sexes have a prominent tail that can be a field mark in flight.
As their name implies, they are associated with timbered wetlands, nesting in cavities and sometimes even feeding in trees. Hens utter a fairly wide range of un-duck like sounds, but most common is a loud wee-e-e-e-k, wee-e-e-e-k.
It is a regular breeder in the Willamette Valley, along slow reaches and backwaters of the Cascade and Coast Range rivers, lakes, and ponds, and along the Columbia River and coastal counties.