Mammalian mesocarnivore visitation at tortoise burrows in a wind farm

Habitat, Wildlife

Author: Mickey Agha, Amanda Smith, Jeffrey Lovich, David Dalaney, Joshua Ennen, Jessica Briggs, Leo Fleckenstein, Laura Tennant, Shellie Puffer, Andrew Walde, Terence Arundel, Steven Price, Brian ToddPublication: J. Wildlife ManagementYear Published: 2017 There is little information on predator–prey interactions in wind energy landscapes in North America, especially among terrestrial vertebrates. Here, we evaluated how proximity…

What Can Birds Hear?

Detection & Avoidance, Wildlife

Author: Robert C. BeasonPublication: USDA Wildlife ServicesYear Published: 2004 For birds, hearing is second in importance only to vision for monitoring the world around them. Avian hearing is most sensitive to sounds from about 1 to 4 kHz, although they can hear higher and lower frequencies. No species of bird has shown sensitivity to ultrasonic…

Sonic Pest Repellents

Detection & Avoidance, Wildlife

Author: Nicholas Aflitto and Tom DeGomezPublication: U. of Arizona Cooperative ExtensionYear Published: 2015 Sonic pest devices are tools that emit sound in the attempt to repel, deter, or kill unwanted animals such as insects, rodents, birds and large mammals. These devices, depending on the target species, cover a wide range of the acoustic spectrum from…

Pilot Study to Evaluate the Effectiveness of DTBird in Reducing Risk of Golden Eagles and Other Raptors Colliding with Operational Wind Turbines

Detection & Avoidance, Wildlife

Author: Jeff Smith, Jeff Zirpoli, Kristina Wolf, Judd Howell, and Scott TerrilPublication: H.T. Harvey & AssociatesYear Published: 2018 The study goals were to evaluate effectiveness of DTBird automated detection and audio deterrent system in reducing the risk of Golden Eagles and other raptors entering the rotor swept zone of operating turbines and to run the…

High Frequency Sound Devices Lack Efficacy in Repelling Birds

Detection & Avoidance, Wildlife

Author: William Erickson, Rex Marsh and Terrell SalmonYear Published: 1992 Ultrasonic or high-frequency sound-producing devices are marketed as a scaring or frightening method for bird control. Although inaudible to humans, most birds also do not hear in the ultrasonic frequency ranges of above 20,000 Hz, thus the credibility of advertised claims raises questions. A review…

Cumulative impacts on Birds

Detection & Avoidance, Wildlife

Author: Agustin Rioperez, Marcos PuentePublication: DTBirdYear Published: 2015 A compilation of data recorded by DTBird systems installed around the world in 2014 and 2015 are presented: Species detected, range/mean values of flights/day/WTG, total number flights/year/WTG, daily profile of flights, number warning/dissuasion signals activated, number and length of Stops.DTBird capabilities have been recently tested during Autumn…

AWWI Technical Report: Evaluating a Commercial-Ready Technology for Raptor Detection and Deterrence at a Wind Energy Facility in California

Bird Collision Risk, Birds, Detection & Avoidance, Wildlife

Author: H.T. Harvey & AssociatesPublication: American Wind and Wildlife InstituteYear Published: 2018 Bird collisions with anthropogenic objects are well documented in the literature, including those involving wind turbines. The purpose of this study was to evaluate and help improve the effectiveness of an automated detection and deterrent system designed to minimize the risk of raptors…