Great Basin Canada goose (Branta canadensis moffitti) productivity and nesting habitat utilization were studied on the Columbia River within the boundaries of the Umatilla National Wildlife Refuge during the springs of 1974 and 1975.
Five islands, BL-1, BL-2, SD-1, SD-2, and Telegraph Island (TI), contained 88 percent of the nesting...
Six standard coyote scent station index lines and one scentless control line were repeatedly sampled from May through October, 1974, on a 400 square mile study area in Central Oregon. The scent station index remained relatively constant at a mean value of 0.025 from May through mid-August; increased to a...
A study of population trends, nest site selection, and food habits of ospreys (Pandion haliaetus carolinensis) nesting on the Bend District of the Deschutes National Forest, Oregon, was conducted
during 1970 and 1971. Intensive observations were made of 95 nesting attempts of ospreys. Energy demands of the population were estimated...