Video: Power lines killing the last remaining Great Indian Bustards in India



On Dec. 9, researchers discovered the remains of an extremely rare bird in India’s Thar Desert, in the northwestern state of Rajasthan. All that remained was a pile of bones, and large, brown feathers, fluttering beneath a power line.

The dead bird, one of the last remaining wild individuals of the critically endangered great Indian bustard (Ardeotis nigriceps), had collided with a power line, said Sutirtha Dutta, a bustard expert at the Wildlife Institute of India (WII) in Dehradun.

“This year alone, we have observed two such power line-related deaths of great Indian bustards in the area,” he said, both casualties occurring near Rajasthan’s Desert National Park. There might have been more such deaths that went unnoticed, he added.

A great Indian bustard walking in Naliya grasslands, Kutch, India. Photo by Prajwalkm via Wikimedia Commons (CC BY-SA 3.0).

“Collisions with power lines are currently one of the biggest threats to the Indian bustards,” said Anoop K.R., the deputy conservator of forests at Desert National Park.

Video by Vikas Verma/Wildlife Institute of India.

Once widespread across India’s grasslands and dry rural landscapes, the ostrich-like great Indian bustard has disappeared from across 90 percent of its former range. The Thar Desert is the last stronghold of this species: of the 160-odd birds remaining in the wild, about 140 occur in the desert. The bustard’s prime habitat in the region, however, is being rapidly taken over by agricultural fields and a growing, dense network of renewable energy power projects. These crisscrossing wind turbines and electric power lines have become a death trap for birds.

Dutta’s team, which has monitored bird collisions along power lines in the Thar Desert, has found that about five birds of various species die per kilometer of power line every month, either due to electrocution or because of the impact of collision. The most common collision victims include the endangered Egyptian vulture (Neophron percnopterus), the griffon vulture (Gyps fulvus) and the common pigeon (Columba livia). “Given that there are about 6,000 kilometers [3,730 square miles] of power line in that landscape, if we extrapolate, about 18,000 birds possibly die each month due to power lines there,” Dutta said. “This is what our preliminary results show.”

The great Indian Bustard is one of the victims.

It is a heavy bird — males can weigh up to 15 kilograms (33 pounds) — that flies at low heights. The bird also has poor frontal vision, and this smaller vertical extent to which it can see means it often does not spot the electric lines until it is too late. “The bustards only see the wires when they are already very close, and because of their heavy flight and slow movement they are unable to maneuver in the nick of time,” Dutta said.

This is a common problem across bustard species. The endangered Ludwig’s bustard (Neotis ludwigii) and the near-threatened kori bustard (Ardeotis kori) are two of the most commonly reported power line-collision victims in South Africa, according to a study published in 2010. Deaths due to collisions also seem to be altering the migration patterns of the great bustard (Otis tarda) in Spain.

For the Indian bustard, which is already extremely threatened, even a few such accidental deaths could lead to extinction, according to experts.

These deaths can be prevented, Dutta says. His team has recommended installing brightly colored markings known as bird flight diverters on the transmission lines, for instance, which will make the power lines more conspicuous to the birds. While not a foolproof system, studies have shown that bird diverters can reduce collision-related deaths.

In May this year, Dutta’s team handed out over 27 bird diverters to power companies like Suzlon Energy for testing in Thar.

“But nothing has happened on ground yet,” Anoop said.“Wind mill companies are not very interested in doing this because they say that this is a costly affair.”

The forest department and conservationists from WII have also recommended running some transmission lines underground, especially those in the high-risk zones. This is not unprecedented. The neighboring state of Gujarat, for example, took some of its high-tension power lines underground after some 400 flamingos were killed on the lines over a span of 10 days.

In Thar, though, the power companies have not been very responsive.

“In one of the meetings I attended with the power companies and the government in Jaipur, this issue was raised and the engineers of the companies said that there is no technology for laying high-voltage lines underground,” Anoop said. “If the technology becomes available for under-grounding, we can compel the companies to do it.”

The lower-voltage power lines can, however, be taken underground, Dutta said, but time is running out. “At the current rate, this will probably be done in the next four to five years, but that will be too late. The whole point is that they have to do it right now.”

(The power companies had not responded to a request for comments at the time of publishing this story).

Power lines are not the only threats. As a bird that nests on the ground, the Indian bustard’s eggs are threatened by predators like dogs and crows,said Gobind Sagar Bhardwaj, the former chief conservator of forests in Rajasthan, who is now director of the state’s Sariska Tiger Reserve. “Which is why the government has created breeding closures for the birds with predator proof fencing,” he said. “And we have had encouraging results. From 2014 onwards, we have been receiving reports of not less than half-a-dozen chicks every year, which is very encouraging.”

There is still hope for the bird, Bhardwaj added. “We should keep fighting for the species. And one way to do that is to start captive breeding of the birds.”

Dutta agreed. “That is one thing that can buy us some time,” he said. “Ultimately you have to reintroduce the birds to the wild, but what it can do is buy us time while we continue our conservation efforts on the ground. But captive breeding can help only if it happens soon.”

A great Indian bustard in Nannaj, Maharashtra state. Photo by Shreya Dasgupta / Mongabay.
Two great Indian bustards have died in the Thar desert this year. Photo by Vikas Verma/Wildlife Institute of India.
Dead great Indian bustard beneath a power line. Photo by Bipin C.M.

This article by Shreya Dasgupta was first published on Mongabay.com on 26 Dec 2017.

 

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Grace Neff

The sad reality of power lines.

Karen Lyons Kalmenson

this really SUCKS 🙁

Marilyn Ashman

So Incredibly Sad 🙁 . There should have been undergrond lines years ago!

Linda Badham

Do something about this then !

Maggie Frazier
Maggie Frazier

The idea of making the lines & the turbines more visible seems to be the best idea – not a new one! That’s what is done on electric wire in pastures & has been done for years. I have no idea how that could be implemented in India for this purpose, but seems if there is a will to do it, a way could be found!

Timothy Kinkead

INDIA NEEDS TO DO A BETTER JOB OF PROTECTING ALL OF IT’S ANIMALS!

Andy Joyce

just give the rest of the Bustards H1b visas to get away… oh wait, that loophole is closing 😛
on a serious note, the plight of those birds is sad