By Rebecca Lewis @RebeccaSLewis

MEET the selfless brothers battling to save wildlife in the world’s most polluted city

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A man looks on as Nadeem Shahzad rescues a barn owl chick from his house in New Delhi

Animal lovers Mohammad Saud, 33, and Nadeem Shehzad, 37, have spent the last decade nursing injured birds back to health in New Delhi, India - where smog levels have grown out of control.

Super Cute! A rescued barn owl chick arrives at the shelter

The pair were inspired to start the rescue centre in 2003 after struggling to find help for an injured bird they came across as teenagers.

The wing of a shikra, or little banded goshawk, gets a check up at the rescue shelter

They have since looked after thousands of birds and currently have a 170 at their home - including owls, eagles and hawks. Many are victims of the city's chaotic roads and environment.

Shabnam Bano holds an injured Black Kite as husband Mohammad Saud cuts the old bandage to check its wound

Mohammad said: “The idea for this initiative came when we found an injured black kite twenty years ago and could not find a place to get it treated. No one cares about them since they are birds of prey.”

Fine Feathers! Mohammad checks the wing of a barn owl

One section of their home’s terrace is sectioned into areas for the birds to recover from illness. One part is left uncovered to allow the birds to fly away once they have regained their strength.

Thirsty work! Mohammad Saud helps a rescued barn owl chick drink water at the shelter

Nadeem said: “Annually we receive around 1,500 cases, most injuries are due to glass-coated kite strings, and some have tumours and infections.”

Mohammed added: “We consult doctors, read books or browse the internet about how to treat various kinds of bird injuries.”

A rescued owl sits on a table surrounded by medical supplies

They spend nearly £400 a month on medical and nutritional expenses for the birds. Sometimes they receive funds from friends and relatives.

Bedraggled bird: Mohammad handles a black kite

Mohammed said: “We manage all the expenses on our own but we hope to get some more donors.

The brothers have looked after thousands of birds at their home - including owls, eagles and hawks

“These birds need hospitals to treat their ailments, just as humans do.”

Earlier this year the World Health Organisation named Delhi as the world's most polluted city - with air pollution three times that of Beijing.