2001 | Publisher: USGS | Science Center: Upper Midwest Environmental Sciences Center (UMESC, LaCrosse) | Format: URL
www.umesc.usgs.gov — Research at the Upper Midwest Environmental Center, which gathered detailed observations on tree swallow nesting success and contaminant concentrations in 1998-2000, to guide EPA and the U.S. Fish and Wildlife Service in effectively managing the risk of chemical contaminants to wildlife and the environment.
Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: .PDF
www.werc.usgs.gov — One cause for declines in desert tortoise populations is predation on juveniles by common ravens (Corvus corax), a predatory bird species native to the Mojave Desert. The Recovery Plan for the Desert Tortoise recommended that research be conducted on sources of mortality (including natural predation). This study was implemented to investigate the More...
Publisher: USGS (Snake River Field Station (SRFS)) | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL
srfs.wr.usgs.gov — Lapland Longspurs (Calcarius lapponicus) are a common breeding passerine on the tundra of northern Alaska and throughout the holarctic. This study has two components: the design of an area census survey method for Lapland longspurs with applicability to other highly visible species in open habitats, and 2) the description and quantification of the More...
Publisher: Other (Society of Environmental Toxicology and Chemistry (SETAC)) | Format: .PDF
www.pwrc.usgs.gov — From the abstract: Environmental contaminants can have profound effects on birds, acting from the molecular through population levels of biological organization. An analysis of potential contaminant threats was undertaken at 52 Important Bird Areas (IBAs) within the northeastern Atlantic coast drainage. Using geographic information system More...
Publisher: USGS | Science Center: Southwest Biological Science Center (SBSC, Flagstaff) | Format: URL
sbsc.wr.usgs.gov — The Southwestern Willow Flycatcher (Empidonax traillii extimus) is a small passerine bird placed on the federal Endangered Species list in 1995. The purpose of this web site is to provide a centralized location where the viewer can find out what the flycatcher looks and sounds like, and learn about the status, distribution, biology and habitats of More...
Publisher: USGS | Science Center: Patuxent Wildlife Research Center (PWRC, Laurel) | Format: URL
www.pwrc.usgs.gov — Breeding Bird Survey (BBS) is a project monitored by the USGS and the Canadian Wildlife Service on the status and trends of North American bird populations. The data can be used to estimate population trends and relative abundances at various scales. The BBS is a cooperative effort between the U.S. Geological Survey's Patuxent Wildlife Research More...