The Audubon Kern River Preserve is a riparian nature reserve owned by the National Audubon Society in the US state of California, near Weldon in Kern County. The preserve is located in one of the largest contiguous riparian forests remaining in the state. The 3,000-acre (12 km2) preserve provides habitat for rare and Audubon's endangered birds, one of which is the federally listed endangered southwestern willow flycatcher, a subspecies of the willow flycatcher. The preserve is located within a designated Globally Important Bird Area, a program of the National Audubon Society with its partner BirdLife International to identify and protect critical avian habitats.