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…
Publication: Australian Transport Safety BureauYear Published: 2002 Birdstrikes continue to be a problem for aviation worldwide, costing approximately $US3 billion annually. Increasingly, funds are being directed towards research which focuses on bird control and avoidance methods. Two such methods which are proving to be successful, are the use of hand held laser devices to scare…
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…
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…
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…
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…
Author: Philip SpearPublication: Bird Control Seminars ProceedingsYear Published: 1996 The last speaker on any program as broad as this one has been usually finds that anything worthwhile he may have had in mind has already been said by one of the earlier speakers. My predicament is even more difficult because the topic for this period…
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…
Author: Dr. R. DoolingPublication: University of MarylandYear Published: 2002 This report provides a complete summary of what is known about basic hearing capabilities in birds in relation to the characteristics of noise generated by wind turbines. It is a review of existing data on bird hearing with some preliminary estimates of environmental noise and wind…
Author: Abd El-Aleem Saad Soliman DesokyPublication: Sohag UniversityYear Published: 2014 Birds are a serious problem at airports threat to aviation safety. Since the early days of aviation, collisions of aircraft and birds have taken place, sometimes with fatal consequences Generally, the damage due to their size of the bird species involved, hunting behavior, and hovering/soaring…