Detection & Avoidance

A Review of Bird Control Methods at Airports

Abd El-Aleem Saad Soliman Soliman Desoky, Sohag University, 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 habits. The combination of abundant food sources, open space, and availability of perching structures on airport grounds and near runway/taxiway areas provides ideal hunting opportunities for many raptors. Also, the behavior of bird species influences the risks, forinstance flocking or certain migration...

Avian Hearing and the Avoidance of Wind Turbines

Dr. R. Dooling, University of Maryland, June 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 turbine noise at Altamont Pass, California, in the summer of 1999. It is intended as a resource in future discussions of the role that hearing might play in bird avoidance of turbines.

Control Methods and Devices-Comments of the National Pest Control Association

Spear, Philip J., Bird Control Seminars Proceedings, 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 is "What's New from Research Laboratories," but I neither work in a laboratory, nor have I had an opportunity in recent months to visit laboratories concerned with bird control work. It may be useful, however, to review some of the considerations that go into recommendations concerning bird management. Later I will make some comments concern...

Cumulative impacts on Birds

Agustin Rioperez, Marcos Puente, DTBird, 18 November 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 2014 in Calandawind wind turbine (Switzerland), model Vestas 3MW with tower height of 119 m, and rotor diameter of 112 m. The study was coordinated by Interwind AG, and financed by the Swiss Federal Offices of Energy and...

High Frequency Sound Devices Lack Efficacy in Repelling Birds

Erickson, William A.; Marsh, Rex E.; and Salmon, Terrell P, 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 of efficacy studies conducted and published by a number of researchers fails to demonstrate the usefulness of such bird control devices.

Sonic Pest Repellents

Nicholas Aflitto and Tom DeGomez, The University of Arizona Cooperative Extension, October 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 below what humans perceive (infrasonic) to above our hearing range (ultrasonic). Infrasonic is characterized as sound below 20Hz, whereas ultrasonic sound is defined as sound above 18,000 Hz. Ultrasonic devices are typically marketed to target arthropod (including spiders, scorpions and insect pests) and mammal pests, while devices...

The Hazard Posed to Aircraft by Birds

Department of Transport and Regional Services, Australian Transport Safety Bureau, November 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 birds from the airport environment, and the use of the US developed Avian Hazard Advisory System (AHAS), which allows aircraft to avoid high-risk birdstrike areas. This study investigated the Australian birdstrike data for the period 1991 to 2001. Although limited, the available...

What Can Birds Hear?
Robert C. Beason USDA Wildlife Services, 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 frequencies (>20 kHz). Sensitivity to frequencies below 20 Hz (infrasound) has not received much attention; however, pigeons and a few other species have shown behavioral and physiological responses to these low frequencies. In general, frequency discrimination in birds is only about one-half or one-third as good it is for...

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