The plastic ring had shut the migratory bird's beak and it was unable for eat for a week, Shyam Sundar Kaushik, DFO Wildlife Gurgaon range, said.
The bird was spotted in Gurgaon a week ago by some bird photographers who spent long hours in the wetlands of Gurgaon to click picture of the migratory birds.
They alerted the agencies about it and the bird was rescued from Najafgarh drain.
"The bird is under observation of veterinary doctors and will be release in the next two days, if found health," Kaushik said.
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