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2007 | Publisher: USGS | Format: URL
pubs.usgs.gov — The Southwestern Willow Flycatcher (Empidonax traillii extimus) is an endangered bird that breeds only in dense riparian habitats in six southwestern states (southern California, extreme southern Nevada, southern Utah, southwestern Colorado, Arizona, and New Mexico). This report synthesizes information on all known Southwestern Willow Flycatcher More...
2006 | Publisher: USGS | Science Center: Fort Collins Science Center (FORT, Ft. Collins) | Format: URL
www.fort.usgs.gov — Although the monitoring of black-footed ferret (Mustela nigripes) populations following reintroductions has not been haphazard, several ferret recovery groups since 1994 have recommended development of uniform standards prescribing minimum methods, intensities, and frequencies of monitoring that would provide data on population size, mortality More...
Publisher: USGS | Science Center: USGS Other | Format: URL
gisdata.usgs.gov — This interactive GIS search tool provides a portal for accessing extant information along the U.S.- Mexico Border. The tool allows the user to search the database by place name, boundaries, transportation features, weather, hydrography, biology, geology, infectious disease, orthoimagery, land cover, and elevation.
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: Other Federal Agency (Center for Coastal Monitoring and Assessment (CCMA)) | Format: URL
www8.nos.noaa.gov — This website identifies and assesses biological effects associated with contaminant exposure. Over forty intensive regional studies have been conducted since 1986 using the Sediment Quality Triad approach which utilizes a stratified random sampling method to determine the areal extent of contaminated sediments. The data include: sediment More...
Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL
fresc.usgs.gov — Spotted owls are mostly non-migratory, long-lived birds whose populations have declined in mature forests of western North America. They are classified as three subspecies: California, northern, and Mexican. Northern and Mexican spotted owls are listed as threatened under the U.S. Endangered Species Act, and California spotted owls are not. In More...
Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL
srfs.wr.usgs.gov — The International Shorebird Survey (ISS) in the eastern and central United States and the Maritimes Shorebird Survey in southeastern Canada have been conducted for more than 20 years and provide a wealth of information about how to survey shorebirds in these areas through both national and regional monitoring programs. Enormous progress has been More...
Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL
srfs.wr.usgs.gov — The Bald Eagle Census, served up by the US Geological Survey and coordinated by the 2007 Midwinter Bald Eagle Survey, counted bald eagle populations in 37 States. The survey is a unique source of long-term data on bald eagles and provides an opportunity to monitor changes or threats to habitat at important wintering areas. Users have access to More...
Publisher: USGS | Science Center: Fort Collins Science Center (FORT, Ft. Collins) | Format: URL
www.fort.usgs.gov — How do you study something that flies under cover of darkness? This question persistently troubles scientists investigating the mysterious lives of bats. The 45 bat species that occur in the continental United States play important roles in U.S. ecosystems as major predators of flying insects and pollinators of desert plants. Bats also play an More...
Publisher: USGS | Science Center: Fort Collins Science Center (FORT, Ft. Collins) | Format: URL
www.fort.usgs.gov — Captive desert tortoises (gopherus agassizii) are getting a "second chance" to live and reproduce in the deserts of the southwest thanks to a unique partnership among state and federal agencies in Nevada. As part of the Desert Tortoise Translocation and Habitat Efficacy Study, captive desert tortoises will be released starting March of 1997 onto More...
Publisher: USGS | Science Center: Fort Collins Science Center (FORT, Ft. Collins) | Format: URL
www.fort.usgs.gov — Sagebrush ecosystems are diverse habitats found throughout western North American that support a variety of flora and fauna. Home to unique wildlife such as Sage-grouse, Sage Thrashers, Brewer's Sparrows, Ferruginous Hawks, and pygmy rabbits, these ecosystems have undergone intense changes since the time when millions of bison roamed the plains. More...
Publisher: USGS | Science Center: Northern Rocky Mountain Science Center (NRMSC, Bozeman) | Format: URL
www.nrmsc.usgs.gov — The boreal toad (Bufo boreas) is rare over much of its range and declines have been documented or are suspected in many areas of the West, including the northern Rocky Mountains. This issue overview evaluates the hypothesis that fire suppression and exclusion could cause decline of the boreal toad (Bufo boreas) in the northern Rocky Mountains.
U.S. Department of the Interior |
U.S. Geological Survey