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DTBird’s ability to detect and deter large raptors, particularly golden eagles, and to reduce the risk of collisions with wind turbines (WTG) was evaluated in the USA by H.T. Harvey & Associates for the American Wind Wildlife Institute.

The evaluation was carried out in 7 DTBirdV4D4 units installed in 2016 in a California wind farm, using eagle-like unmanned aerial vehicles (aka, UAV) with a 2 m wingspan, and studying in situ large raptor behavior registered during 2017.

The evaluation yielded the following major results:

  • DTBirdV4 Detection Module:
    • Up to 99%1 Overall eagle-like UAV Detection rate from > 230 m to the Rotor Swept Area (RSA).
    • 63% mean Detection rate per distance band of 30 m (7 distance bands from >230 m to the RSA).
    • 2.5 False Positive rate (flight recording of something other than birds)/WTG/day2.
  • DTBirdD4 Collision Avoidance Module:
    • Deterrence response rates3 when considering unequivocally successful deterrence and potential deterrence:
      • 52-83% for golden eagles.
      • 36-76% for buteos.
      • 39-78% for all raptors. 
  • DTBirdV4D4 service reliability4:
    • >98% System.
    • >98% HD Cameras.
    • 100% Collision Avoidance.

To see the original report with DTBird notes, please go to this Link.

img

DTBirdV4D4 unit installed at Manzana Wind Power Project.

1 DTBird calculation for a flight path from >230 m to the RSA, through 7 distance bands with the mean detection rate presented in the Pilot Study (figure 19, page 51; DTBird note on the same page gives calculation details and online access to these calculations). Lower overall detection rates or even no detection is expected under specific conditions (e.g. flights entering the surveillance area at less than the maximum detection distance, or flight paths through sun glare areas).
2 The FP rate has been calculated by DTBird with the data provided in the Pilot Study, as detailed in DTBird note in epigraph: 4.1 DTBird Targeting Efficiency, page 58.
3 Including the potential interacting effect of the spinning blades, that requires a controlled experiment to be isolated.
4 Maintenance Summary provided by DTBird, located in table G1, pages 84-86.

DTBird’s ability to detect and deter large raptors, particularly golden eagles, and to reduce the risk of collisions with wind turbines (WTG) was evaluated in the USA by H.T. Harvey & Associates for the American Wind Wildlife Institute.

The evaluation was carried out in 7 DTBirdV4D4 units installed in 2016 in a California wind farm, using eagle-like unmanned aerial vehicles (aka, UAV) with a 2 m wingspan, and studying in situ large raptor behavior registered during 2017.

The evaluation yielded the following major results:

  • DTBirdV4 Detection Module:
    • Up to 99%1 Overall eagle-like UAV Detection rate from > 230 m to the Rotor Swept Area (RSA).
    • 63% mean Detection rate per distance band of 30 m (7 distance bands from >230 m to the RSA).
    • 2.5 False Positive rate (flight recording of something other than birds)/WTG/day2.
  • DTBirdD4 Collision Avoidance Module:
    • Deterrence response rates3 when considering unequivocally successful deterrence and potential deterrence:
      • 52-83% for golden eagles.
      • 36-76% for buteos.
      • 39-78% for all raptors. 
  • DTBirdV4D4 service reliability4:
    • >98% System.
    • >98% HD Cameras.
    • 100% Collision Avoidance.

To see the original report with DTBird notes, please go to this Link.

img

DTBirdV4D4 unit installed at Manzana Wind Power Project.

1 DTBird calculation for a flight path from >230 m to the RSA, through 7 distance bands with the mean detection rate presented in the Pilot Study (figure 19, page 51; DTBird note on the same page gives calculation details and online access to these calculations). Lower overall detection rates or even no detection is expected under specific conditions (e.g. flights entering the surveillance area at less than the maximum detection distance, or flight paths through sun glare areas).
2 The FP rate has been calculated by DTBird with the data provided in the Pilot Study, as detailed in DTBird note in epigraph: 4.1 DTBird Targeting Efficiency, page 58.
3 Including the potential interacting effect of the spinning blades, that requires a controlled experiment to be isolated.
4 Maintenance Summary provided by DTBird, located in table G1, pages 84-86.
Monday, 24 September 2018 12:26

DTBird System Brochure

bats
DTBird System Brochure. September 2017.
bats
DTBat System Brochure. September 2017.
Oct2015
DTBird System Specifications for Wind Turbines. November 2017.
Oct2015
Experiences from Sweden's first DTBird installation. Ecocom AB December 2016
Oct2015
Poster. Evaluation DTBird Collision Avoidance Module models 2014-2015.
Oct2015
DTBird System Evolution. Jan 2016.
generic
DTBird Factsheet Bird Collision Probability. Sep 2015.
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DTBird Factsheet Bird Monitoring Onshore. Sep 2015.
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DTBird Factsheet Bird Monitoring Offshore. Sep 2015.
towers
DTBird Datasheet Bird & Bat Monitoring at Met Towers. Oct 2014.
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DTBird Case Studies Shutdown On Demand. Mar 2014.
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DTBird vs. Radar. Jan 2013.
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DTBat System - Specifications for Wind Turbines. May 2016.

The model DTBirdV4D8 has been installed in the Wind Farm Terna, in Thrace (Greece) under the project LIFE12 BIO/GR/000554. This project aims to demonstrate the practical application of post-construction assessment and post-construction mitigation. DTBird was already participating in the LIFE project with the model DTBirdV4D4 that started operating at the Wind Farm and the Park of Energy Awareness (PENA) of CRES at Keratea (Greece) at the beginning of 2016.

 

DTBirdV4D8 installation in Wind Farm Terna Greece

DTBird model V4D8 installation in Wind Farm Terna, Greece.

The model DTBirdV4D8 has been installed in the Wind Farm Terna, in Thrace (Greece) under the project LIFE12 BIO/GR/000554. This project aims to demonstrate the practical application of post-construction assessment and post-construction mitigation. DTBird was already participating in the LIFE project with the model DTBirdV4D4 that started operating at the Wind Farm and the Park of Energy Awareness (PENA) of CRES at Keratea (Greece) at the beginning of 2016.

 

DTBirdV4D8 installation in Wind Farm Terna Greece

DTBird model V4D8 installation in Wind Farm Terna, Greece.

Wednesday, 04 April 2018 11:08

DTBird in Germany

At first, at the end of 2015, DTBirdV4 started operating in the offshore Platform FINO 1, over 40km offshore in the North Sea, contracted by the Bundesamt für Seeschiffahrt und Hydrographie (BSH). This year the models DTBirdV4D8 and DTBirdV8 have been installed for the first time in onshore wind turbines in Lower Saxony and Bavaria.

DTBird will participate in the following events, the first one giving the guest lecture of "Field Ornithology" at the University of Applied Sciences Weihenstephan-Triesdorf on April 10th. In the second event DTBird will attend WindEnergy Hamburg at hall A1, stand 203 on September 25-28th.

DTBird models installation in onshore wind turbine Germany

DTBird models installed in onshore wind turbines, Germany.

Wednesday, 04 April 2018 11:04

DTBird in Germany

At first, at the end of 2015, DTBirdV4 started operating in the offshore Platform FINO 1, over 40km offshore in the North Sea, contracted by the Bundesamt für Seeschiffahrt und Hydrographie (BSH). This year the models DTBirdV4D8 and DTBirdV8 have been installed for the first time in onshore wind turbines in Lower Saxony and Bavaria.

DTBird will participate in the following events, the first one giving the guest lecture of "Field Ornithology" at the University of Applied Sciences Weihenstephan-Triesdorf on April 10th. In the second event DTBird will attend WindEnergy Hamburg at hall A1, stand 203 on September 25-28th.

DTBird models installation in onshore wind turbine Germany

DTBird models installed in onshore wind turbines, Germany.

First DTBirdV8 unit and DTBatD3 unit have started operating in Windpark Krammer, located in Zeeland, The Netherlands. Additional units will be installed during the wind farm construction until 2019. These are the first DTBird&DTBat units installed in concrete towers.

DTBird model installation Wind Farm Krammer The Netherlands

First DTBirdV8 unit and DTBatD3 unit have started operating in Windpark Krammer, located in Zeeland, The Netherlands. Additional units will be installed during the wind farm construction until 2019. These are the first DTBird&DTBat units installed in concrete towers.

DTBird model installation Wind Farm Krammer The Netherlands

Newsletter
Automatic Bat Monitoring & Protection
DTBat® is a self-working System that detects bat presence in real-time, and takes automatic actions linked to bat detection.
Remarkable applications of DTBat® System are:
  • Autonomous Bat Monitoring.
  • Bat Mortality Reduction through automatic actions.
DTBat® Clients have access to the DTBat® System recordings through an online Software Application named DTBat® Data Analysis Platform (DAP).
 
BatAbout2
DTBat® Detection Module
DTBat® Detection Module surveys the airspace with Bat recorders, detecting and recording bat passes in real-time. Installation design and operational settings are customized for any Target Species and WTG dimensions.
DTBat® Detection Module is equipped with 1 to 3 Bat recorders installed at height on the WTG tower and/or on the nacelle. Recorders are placed in specific locations to achieve the best surveillance of the moving blades area.
DTBat® Stop Control Module
DTBat® Stop Control Module automatically Stops and restarts WTG according to bat activity detected in real-time and/or environmental variables.
Stop trigger and Stop duration criteria are adjustable to target Species or to cover a % of the total bat activity detected (e.g WTG stopped for 95% of the bat activity detected).
aboutBAT3
DTBat Data Analysis Platform
DTBat® Data Analysis Platform (DAP)
DTBat® DAP is a complete online Software Application to provide transparent access to review bat sonograms, environmental data and WTG operational parameters. Graphics and Automatic Service Reports for selected periods are also available. Includes two access right levels: Analyzer and Manager.
DTBird® & DTBat® Worldwide Presence
DTBird Worldwide Installations 2023
DTBird® & DTBat® features are demanded by environmental administrations of an increasing number of countries. Over 500 DTBird® & DTBat® units have been installed at over 110 existing / projected, onshore /offshore wind farms in 16 countries (Austria, Belgium, China, France, Germany, Greece, Italy, Norway, Poland, Spain, Sweden, Switzerland, Taiwan, The Netherlands, the United Kingdom and the United States). DTBird® is operating at WTG since 2009 and DTBat® since 2012.
Latest News
DTBird® announces the publication of the technical specifications for the FALCO system. Already in commercial use for over a year, the system has been deployed across various onshore wind energy projects across Europe and beyond. This formal documentation marks a milestone in DTBird’s commitment to technical transparency and support for wind farm developers, operators, and environmental authorities. With improved flexibility and performance, the DTBird® FALCO system now includes five model configurations — F4, F6, F8, F4+F,6 and F4+F8 — to adapt to different rotor diameters, species profiles, and project requirements. Main Features: • Detection module:  Maximum distance up to 1 km with graphics…
DTBird® Publishes Technical Specifications for the FALCO System
Written on Friday, 12 September 2025 10:41
DTBird® has released the results of an independent study evaluating the detection capabilities of its latest bird monitoring models (F4, A4, F6, A6, and T). The assessment, conducted by the company, used a controlled field methodology to objectively measure maximum and effective detection distances for each model, providing wind farm operators and environmental managers with transparent, verifiable performance data. The evaluation involved controlled flights with a 1.42-meter wingspan avian-mimic drone, which simulated a medium-sized bird of prey. Flights were performed under stable weather conditions, covering a wide range of distances, angles, and trajectories. The drone’s GPS positions were synchronized with…
Evaluation of Detectability and Detection Distances for the new DTBird models
Written on Wednesday, 13 August 2025 16:31
Kincardine Offshore Wind Ltd. (KOWL) has received feedback from NatureScot and official notification from the Marine Directorate Licensing Operations Team (MD-LOT) that Condition 22ai regarding post-construction monitoring of bird strike for the Kincardine floating offshore wind farm has been successfully addressed using DTBird® technology. Project Summary Location: 15 km off the coast of Aberdeen, Scotland, in the North Sea. Turbines: 5 Vestas V164 (9.5 MW, installed 2021), each equipped with the DTBird® V8N2 system to record avian activity and potential collisions, day and night. The first phase of the project included 1 Vestas V80 (2 MW installed in 2018), also equipped…
Kincardine OWF Fulfils Bird Strike Monitoring Consent Condition with DTBird
Written on Tuesday, 12 August 2025 19:10
DTBird & DTBat has released an updated version of the Technical Specifications for the DTBat® system, a solution designed to detect, identify, and protect bats in wind farms. The new edition replaces the previous document published in 2016 and includes significant technical, operational, and installation upgrades. For the first time, the document is available in a bilingual format (English and Español), reflecting the company’s international scope and commitment to making its systems more accessible for global wind energy projects, particularly in markets with increasing biodiversity regulations. Over 40 DTBat® systems have been installed in several countries since the commercial launch in 2012. It…
DTBird® Releases New Technical Specifications for Bat Protection in Wind Turbines
Written on Wednesday, 06 August 2025 14:38
See all news
Contact
DTBird® & DTBat® are trademarks of Liquen Consultoría Ambiental,S.L., a leading Spanish Technological Firm specialized in Wildlife Protection at Wind Farms.
 
With Headquarters in Madrid, and worldwide installations, Liquen Team is the unique Seller and Technical Support Provider of DTBird® & DTBat® Technology.
 

+34 91 344 90 86

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