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Resource Documents by Brandes, David

Katzner, Todd; Brandes, David; Miller, Tricia; et al.
Topography drives migratory flight altitude of golden eagles: implications for on-shore wind energy development
Summary: 1. Wind power is a fast-growing industry with broad potential to impact volant wildlife. Flight altitude is a key determinant of the risk to wildlife from modern horizontal-axis wind turbines, which typically have a rotor-swept zone of 50–150 m above the ground. 2. We used altitudinal GPS data collected from golden eagles Aquila chrysaetos tracked using satellite telemetry to evaluate the potential impacts of wind turbines on eagles and other raptors along migratory routes. Eagle movements during migration were . . . Complete article »

Katzner, Todd; Brandes, David; Lanzone, Michael; Miller, Trish; and Ombalski, Dan
Raptors and Wind Energy Development in the Central Appalachians
There is little current available information as to how wind energy projects in the central Appalachians area will affect bird populations (NRC, 2007). However, it is known that diurnal raptors are generally at higher risk for collision with turbines than are many other avian species (NWCC, 2004). Furthermore, potential cumulative effects on birds are broader than just those from direct collisions. In particular, increased energetic costs of migration, avoidance of preferred migration pathways, and change or loss of migration habitat . . . Complete article »

Brandes, David
Wind Power Development and Raptor Migration in the Central Appalachians
This article was published in Hawk Migration Studies, Spring 2005. “The potential conflict between wind power and raptors is now cdlear, as raptor migration is often concentrated along higher elevations such as ridgetops and the edges of plateau escarpments because of the presence of updrafts from deflected surface winds. … [T]he potential for raptor mortality at new wind power plants in the central Appalachians, a region well known for raptor migration along its many ridges and escarpments, is clear. Despite . . . Complete article »

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