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Wind farms downing avian visitors  

Credit:  Blades of trouble | Kalyan Ray | DH News Service, New Delhi | May 27 2019 | www.deccanherald.com ~~

Two wind farms in Karnataka and Gujarat are providing fresh evidence over how green energy sources are turning out to be deadly for migratory birds.

With an installed capacity of more than 32,000 MW, India is the world’s fourth largest producer of wind energy, planning to generate 60 GW by 2022.

But the massive scaled up target may be counter-productive to the birds, particularly the migratory ones and raptors, suggests a new study.

The new evidence comes from two commercial wind farms in Samakhiali region of Kutch in Gujarat and Harapanahalli of Davanagare district of Karnataka.

Indian ornithologists found carcasses of more than 50 birds – including globally threatened Dalmatian pelican and near-threatened painted stork – at the two sites in three years, as winged visitors die after colliding with the rotating blades of the wind turbines.

“The numbers would have been more if we were able to do a daily survey. But our survey frequency was once in 40 days. We studied the Kutch unit for three years and Davanagere unit for a year,” Selvaraj Ramesh Kumar, lead researcher from Bombay Natural History Society, Mumbai, told DH.

Spread over an area of 120 sq km area, the Gujarat wind farm comprises about 200 turbines, of which 59 were chosen for the study. On the other hand, located in Hyarada Block-C Reserved Forests, the Davanagere wind farm has 24 wind turbines spread over an area of 56 sq km, all of which were monitored for the study.

Carcass surveys were conducted at Samakhiali between October 2011 and July 2014 during which 47 bird carcasses belonging to at least 11 species were found. In Harapanahalli wind farm, searched were conducted between January 2014 and February 2015 during which seven carcasses from three species were found.

“This also has ecological implications as several birds of prey species (raptors) are killed. Raptors have very low reproduction rates and they sit on top of the food chain in the avian world,” said V Anoop, a researcher at Salim Ali Centre for Ornithology and Natural History, Coimbatore.

Source:  Blades of trouble | Kalyan Ray | DH News Service, New Delhi | May 27 2019 | www.deccanherald.com

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