Khurram feeds leftover bread to kites, as a form of charity to bring good luck and ward off adversity, along Ravi Bridge in Lahore. Reuters

The tradition of tossing offerings off a bridge - which are swooped up by hawks and kites - has long provided a source of livelihood for hundreds of roadside vendors in bustling Pakistani cities such as Lahore and Karachi.

The practice has long been banned but continues in Lahore and other parts of the country of 240 million.

Shabnam, who only gave her first name, told reporters she has been selling the packets for a year to support her younger siblings. She sells each packet for Rs20 ($0.07), and makes around Rs500 a day. She keeps 40% and gives the rest to a man who has hired her as a vendor.

Kite birds fly as they are fed with meat along Ravi Bridge in Lahore. File / Reuters

Dil Muhammad said, for 10 years, he has employed at least six girls as vendors along a small section of a bridge in Lahore. He said he buys the meat, which consists of waste scraps, from local markets and distributes it amongst his hires.

Amir, a rickshaw driver, said he regularly buys packets to "keep his life safe" as he is on the road all day and fears getting into accidents in Lahore's heavy traffic. He tosses the meat off the bridge and watches birds swoop down to catch it before it hits the water below.

Wildlife officials say the constant feeding of predatory birds has made them more aggressive towards humans and their increasing number has also adversely affected the population of other bird species on whom they prey.

"This consistent food source not only sustains existing populations but also attracts more birds to the area," Muhammad Jamshed Iqbal, a senior manager at WWF Pakistan, said.

"Additionally, the disposal of meat scraps leads to health hazards for both, birds and humans, as it attracts pests and can spread disease."

The increase in the number of kites due to readily available food is also a hindrance to airport operations.

"Kites have been posing a danger to the taking off or landing of flights around Lahore Airport," Saifullah Khan, a spokesperson of the civil aviation authority, told reporters.

He added that the aviation authority in collaboration with the district administration has carried out multiple operations against those who feed birds on the rooftops of their homes around the airport.

Reuters