Filters: partyWithName: USGS Forest and Rangeland Ecosystem Science Center (X) > partyWithName: Steve Hanser (X) > partyWithName: Steven Hanser (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Steve Hanser and Matthias Leu, USGS-FRESC, Snake River Field Station Steve Hanser, USGS-FRESC, Snake River Field Station USGS, Snake River Field Station, GIS Laboratory Tag Types Place (2) Theme (2) Tag Schemes None (2) Geospatial One Stop (1) View Results as: JSON ATOM CSV

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 Proportion of Non-Sage-grouse Habitat Within an 18-km Radius This map depicts the proportion of non-Sage-grouse habitat with 18km of each pixel. The map was produced using a moving window analysis on the Distribution of Non-Sage Grouse Habitat in the Conservation Assessment Area with a search radius of 18km. The product of the moving window was the mean pixel value within the window. This map has a 540m resolution. Tags: Alberta, Arizona, Biology and Ecology, Bird Conservation, British Columbia, All tags... California, Canada, Centrocercus, Colorado, Conservation Assessment, Distribution, Environmant and Conservation, Habitat, Idaho, Land Cover, Montana, Nebraska, Nevada, New Mexico, Non-habitat, North America, North Dakota, Oregon, Sage-grouse, Saskatchewan, South Dakota, United States, Utah, Washington, Wyoming, urophasianus, Fewer tags