Skip to main content
Advanced Search

Filters: Tags: raptors (X)

17 results (92ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
thumbnail
These raster data represent the results of a case study in Arizona on how vertebrate richness metrics can be used with existing state and federal guidance in wind and solar energy facility siting. Each of the four geodatabases (see Cross References) contain eight native terrestrial wildlife group models in Arizona: 1) all vertebrates, 2) amphibians, 3) reptiles, 4) birds, 5) mammals, 6) bats, 7) raptors and 8) long-distant migratory birds. An XML workbook is included that lists all terrestrial native vertebrate species in Arizona which cross-walks these species to the name of the National Gap Analysis Project species distribution model.
Present power markets are designed for trading conventional generation. For wind generation to participate in a short-term energy market, lengthy wind power production forecasts are required. Although wind speed forecasting techniques are constantly improving, wind speed forecasts are never perfect, and resulting wind power forecast errors imply imbalance costs for wind farm owners. In this paper, a new method for minimization of imbalance costs is developed. Stochastic programming is used to generate optimal wind power production bids for a short-term power market. A Wind power forecast error is represented as a stochastic process. The imbalance costs resulting from this strategy are then compared to the case when...
thumbnail
Conclusions: The study recorded flushing responses (whether or not an animal fled in response to disturbance) and flush distances of 6 species of diurnal raptors exposed to walking and vehicle disturbances in order to calculate minimum distances for species-specific buffer zones. In general, walking disturbances resulted in more flushing than vehicle disturbances for all species except the prairie falcon. For walking disturbances, a linear relationship existed between flight distance and body mass, with lighter species flushing at shorter distances; however, this trend did not hold for vehicle disturbance. Birds flushed at much shorter distances in response to approaching vehicles. Thresholds/Learnings: Buffer...
thumbnail
This data set is a spreadsheet resulting from monthly searches for dead birds along randomly selected power line segments in and near the Snake River Birds of Prey National Conservation Area (NCA) in Southwestern Idaho. Data include information regarding causes of mortality, the species of birds killed, and details of the equipment associated with the power poles where birds were found. Dead birds were recovered along 3-phase distribution lines Data were collected between 1999 and 2005.
Increased raptor and corvid abundance has been documented in landscapes fragmented by man-made structures, such as fence posts and power lines. These vertical structures may enhance raptor and corvid foraging and predation efficiency because of increased availability of perch, nesting, and roosting sites. Concomitantly, vertical structures, in particular power distribution lines, have been identified as a threat to sage-grouse (Centrocercus spp.) conservation. To mitigate potential impacts of power distribution lines on sage-grouse and other avian species, the electrical power industry has retrofitted support poles with perch deterrents to discourage raptor and corvid use. No published information is available regarding...
Several species of raptors winter at Rocky Mountain Arsenal National Wildlife Refuge (Refuge) including the Bald Eagle (Haliaeetus leucocephalus), Ferruginous Hawk (Buteo regalis), Red-tailed Hawk (Buteo jamaicensis), and Rough-legged Hawk (Buteo lagopus). Raptors were monitored each winter from 1988-89 to 1996-97 using a standardized road survey. Black-tailed prairie dogs (Cynomys ludovicianus) form a major component of the prey base for wintering raptors on the Refuge, with 1850 ha of active prairie dog towns mapped in 1988. Prairie dog town areas and population data were determined by mapping active towns and conducting visual counts on study plots to determine population density on an annual basis from 1988...
thumbnail
Data in the form of spreadsheets are the results of searches for dead birds along 1-phase and 3-phase power line segments and at individual poles in the Moon lake Electrical Association service area in northeastern Utah and western Colorado from June 2001-October 2004. Data include mortalities found during randomized pole surveys in the Rangely Oil Field (ROF) in western Colorado, conducted quarterly from July 2001-May 2003, ROF pole censuses conducted monthly from August 2003-August 2004. Data also include mortalities resulting from surveys of randomly selected 2-km and 5-km power line segments conducted throughout the Moon Lake service area from September 2001-May 2003, incidental mortalities found and reported...
A small numbers of Ospreys (Pandion haliaetus) are known to have nested historically in Utah. A precise baseline figure is unavailable, but the 19th-century Osprey population in Utah probably consisted of at least 15 breeding pairs scattered in 4 geographic regions. Human persecution is believed to have caused the abandonment of nesting territories along the Wasatch Front and in the western Uinta Mountains by 1900 and 1960, respectively. Osprey populations in the southern plateaus and Green River areas, however, began increasing in the late 1970s. Several recent nesting attempts and numerous summer sightings at nontraditional and abandoned historical sites in Utah suggest the Osprey is also expanding its range in...
thumbnail
The mission of HawkWatch International (HWI) is to conserve the Golden_Eagleenvironment through education, long-term monitoring, and scientific research on raptors as indicators of ecosystem health. We believe that through our efforts to monitor and protect birds of prey (also known as raptors), we can also protect our shared environment, our rich natural heritage, and ourselves. HWI was founded as a non-profit, tax-exempt 501 (c)(3) organization in 1986.
Categories: Web Site; Tags: migration, raptors
We estimated electrocution rates for raptors and common ravens (Corvus corax) for the Moon Lake Electrical Association in northeastern Utah and northwestern Colorado, USA. From July 2001 to May 2003, we conducted mortality searches at randomly selected distribution line segments and poles within 3 regions, but rate estimates (0.0036–0.0112 deaths/pole/yr) may have been biased by the effects of scavengers and by long sampling intervals (≥3 months), which prevented us from determining the cause of death for most birds because of advanced decay. In 2002–2003, we conducted carcass removal experiments in the Rangely Oil Field (ROF) in northwestern Colorado to estimate scavenging effects, and in 2003–2004, we...
Oil spill response, whether planned by government agencies, oil spill cooperatives or individual companies, can be planned and carried out with the goal of minimizing ecological impacts, not merely removing visible oil. Two oil spill cooperatives on the west coast are implementing such planning. First, a coastal survey was conducted in the cooperative's area of responsibility. Physical processes and habitat types were examined. Oil spill cleanup guidelines were written for each habitat type. Biologically sensitive areas, those sites most vulnerable to oil spill impacts, were identified. Strategies were developed to protect most sensitive areas, i.e., prevent spilled oil from reaching them. Protection is the preferred...
thumbnail
Distribution of Bald Eagle habitat in coastal British Columbia showing relative abundance (RA) and overall relative importance (RI). RI is based on project region and not on the province as a whole. British Columbia has been collecting coastal resource data in a systematic and synoptic manner since 1979. Resource information is collected using peer-reviewed provincial Resource Information Standards Committee which include standards for data management and analysis


    map background search result map search result map Bald Eagles - Coastal Resource Information Management System (CRIMS) Response of wintering grassland raptors to human disturbance. Raven and Raptor Power Line Mortality Data in the Moon Lake Electrical Association Service Area (Utah and Colorado) - 1995-2002 Raptor-Powerline Mortality Data, Snake River Birds of Prey Conservation Area - 1999-2005 Landscape-scale wildlife species richness metrics Raptor-Powerline Mortality Data, Snake River Birds of Prey Conservation Area - 1999-2005 Response of wintering grassland raptors to human disturbance. Raven and Raptor Power Line Mortality Data in the Moon Lake Electrical Association Service Area (Utah and Colorado) - 1995-2002 Landscape-scale wildlife species richness metrics Bald Eagles - Coastal Resource Information Management System (CRIMS)