A raven being harassed by red-winged blackbirds (Agelaius phoeniceus), Klamath Marsh NWR, OR. The Klamath Basin, Oregon/California, is the greatest wetlands in the West and one of the single most important places on Earth for birds, and the two most important refuges there - the Lower Klamath and Tule - are America's most degraded wildlife refuges. * No photoshop or other manipulation.