Probability of Synanthropic Corvid Presence in the Western United States

Model of habitat utilization by synanthropic avian predators: common ravens (Corvus corax), American crows (Corvus brachyrhynchos), and black-billed magpies (Pica hudsonia). The former two species show increasing nation-wide population trends, and common ravens in the Mojave desert have been shown to have detrimental effects on threatened desert tortoise (Gopherus agassizii) populations. Power lines are used by common ravens and other raptors for nesting and as hunting perches. Linear features such as railroads, primary and secondary roads, and irrigation channels often serve as travel routes for these predators, and expand their movements into previously unused regions. Numbers of synanthropic avian predators increase...

Tags: American Crow, Arizona, Black-billed Magpie, California, Colorado, All tags... Common Raven, Corvid, Corvus brachyrhynchos, Corvus corax, Idaho, Montana, Nevada, New Mexico, Oregon, Pica hudsonia, Presence, Risk, United States, Utah, Washington, Wyoming, Fewer tags

Common Raven Activity in Relation to Land use in Western Wyoming: Implications for Greater Sage-Grouse Reproductive Success

Anthropogenic changes in landscapes can favor generalist species adapted to human settlement, such as the Common Raven (Corvus corax), by providing new resources. Increased densities of predators can then negatively affect prey, especially rare or sensitive species. Jackson Hole and the upper Green River valley in western Wyoming are experiencing accelerated rates of human development due to tourism and natural gas development, respectively. Increased raven populations in these areas may negatively influence the Greater Sage-Grouse (Centrocercus urophasianus), a sensitive sagebrush specialist. We investigated landscape-level patterns in raven behavior and distribution and the correlation of the raven data with the...

Categories: Publication; Types: Citation, Journal Citation; Tags: Centrocercus urophasianus, Common Raven, Corvus corax, The Condor, anthropogenic subsidies, All tags... density and occupancy modeling, greater sage grouse, nest and brood predation, Fewer tags

Anticoagulant rodenticide concentrations in blood and tissue of California condors and turkey vultures (ver. 2.0, May 2023)

The dataset includes specifics on liver tissue and blood plasma anticoagulant rodenticide concentrations measured using high-performance liquid chromatography-tandem mass spectrometry. This data release supersedes Herring, G., and Eagles-Smith, C.A., 2022, Anticoagulant rodenticide concentrations in blood and tissue of California condors and turkey vultures: U.S. Geological Survey data release, https://doi.org/10.5066/P9NHPLHX. Please contact fresc_outreach@usgs.gov for access.

Categories: Data, Data Release - Revised; Tags: Arizona, California, California condor, Ecology, Oregon, All tags... USGS Science Data Catalog (SDC), Wildlife Biology, anticoagulant rodenticide, avian scavengers, biota, common raven, ecotoxicology, environment, food web, liver tissue, ornithology, plasma, turkey vulture, wildlife biology, Fewer tags

Pacific Northwest Avian Scavenger Lead and Mercury Dataset, 2012-2016

The dataset includes the bird species, region where sampled, sampling site, capture location, mercury concentration in whole blood, lead concentration in whole blood, sulfur stable isotope concentration in blood plasma, carbon isotope concentration in blood plasma, whole blood ALAD activity, and fecal corticosterone concentrations.

Categories: Data; Tags: Ecology, Environmental Health, Oregon, Pacific Northwest, USGS Science Data Catalog (SDC), All tags... Washington, Wildlife Biology, biota, common raven, corticosterone, ecotoxicology, environmental exposure, hypothalamic−pituitary−adrenal axis, stable isotopes, stress, turkey vulture, Fewer tags