Raptors of the Hanford Site and nearby areas of southcentral Washington

Abstract

This report was prepared as an account of work sponsored by the United States Government. Neither the United States nor the Department of Energy, nor any of their employe, nor any of their contractors, subcontractors, or their employees, maker any warranty, express ar implied, or assumes any legal liability or responsibility for the accuracy, cornpletenas or usefulness of m y information, apparatus, product or process disclosed, or represents that its use would not infringe privateiy owned rights. The views, opinions and conctusions contained in this report arc those of the contractor and do not necessarily represent those of the United Statn Government or the United States Department of Energy. PACIFIC NORTHWEST LABORATORY operated by BATTELLE for the UNITED STATES DEPARTMENT OF ENERGY Under Contract Of-ACW76Rt0 7830 hinted in tha United S t r t a of Amcrka A v a i l a h frm W i TatYlnkat tnlwauw krvin uniacd Lacs I3egmmcrR cd c-5235 Port Royd Wed Syxir%(idd, Virginia a 5 1

Phase I remedial investigation report for the 300-FF-5 operable unit, Volume 1

“…Loggerhead shrikes are year-round residents on the Hanford Site, although they occur at relatively low densities (Fitzner et al 1981)). They nest from March through August in undisturbed portions of the big sagebrush/Sandberg's bluegrass community, where they average 3.5 pairs/kin 2 (0.38/m_) in the 200 Area plateau (Poole 1992).…”

“…Burrowing owls are widely distributed on the Hanford Site. The nesting population during the mid-1970s was estimated at 20-26 pairs (Fitzner et al 1981). Most nest sites are found in abandoned badger and coyote burrows.…”

“…Insects represent the majority of prey captures, but Great Basin pocket mice (Perognathus parvus) form the major part of their diet in terms of biomass (Fitzner et al 1981). A nest of owls was found during the riparian surveys in the Columbia River bank just east of burial ground 618-4.…”

“…At least 20 nesting pairs occupy the site, including at least one nest within 10 km (6.2 mi) of the 300-FF-5 Area (Fitzner et al 1981). On the Hanford Site, most nesting occurs in utility towers, on Gable Butte, and in larger trees (Fitzner et al 1981).…”

“…At least 20 nesting pairs occupy the site, including at least one nest within 10 km (6.2 mi) of the 300-FF-5 Area (Fitzner et al 1981). On the Hanford Site, most nesting occurs in utility towers, on Gable Butte, and in larger trees (Fitzner et al 1981). Red-tailed hawks on the Hanford Site primarily feed on medium-sized mammals such as black-tailed jackrabbits and Townsend's ground squirrels, and on snakes (Fitzner et al 1981).…”