Birds migrate to South Asia as the Arctic gets colder. This flock of migratory birds arrived in Kathmandu during their migration.
Black-headed gulls have also been spotted in the rivers and lakes of the Kathmandu Valley. A flock of this bird has been seen around the Bagmati River in Kupondol-Thapathali.
चरा संरक्षणकर्मीहरूका अनुसार चिल प्रजातिको यो चरा युरोप, एसिया र उत्तर एसियामा पाइन्छ । उत्तरी ध्रुवमा चिसो बढेपछि चराहरू दक्षिण एसियातर्फ बसाइँ सर्ने गर्छन् । यो प्रवासी चराको बथान बसाइँसराइका क्रममा काठमाडौं आइपुगेको हो ।
![A flock of black-headed gulls in the Kathmandu Valley [Photos]](https://assets-cdn-api.ekantipur.com/thumb.php?src=https://assets-cdn.ekantipur.com/uploads/source/news/kantipur/2025/miscellaneous/blackheadedgull11032025f9a9549-copy-03112025121725-1000x0.jpg&w=1001&h=0)
![A flock of black-headed gulls in the Kathmandu Valley [Photos]](https://assets-cdn-api.ekantipur.com/thumb.php?src=https://assets-cdn.ekantipur.com/uploads/source/news/kantipur/2025/miscellaneous/blackheadedgull11032025j2a9562-copy-03112025121816-1000x0.jpg&w=1001&h=0)