Spotting a Brown-headed Gull at Taudaha

It was one of those brilliantly clear autumn mornings at Taudaha on the southern outskirts of Kathmandu. This historical pond is regarded as the last remnant of the lake that once covered Kathmandu Valley, where the serpents are still supposed to live.

We do not know about serpents. But Taudaha is an important stopover for migratory waterfowl en route from as far away as Siberia to the plains of the Subcontinent.

While bird-watching at Taudaha in late November, I saw a gull feeding near flocks of other waterfowl that had just flown in from the north. I could not make out through my zoom lens whether it was the Black-Headed, or Brown-Headed Gull. But this was an exciting sighting, and I clicked several shots.

About a dozen migratory duck species are sighted in Taudaha every winter, including the  Common Coot, Common Moorhen, Little Cormorant, Oriental Darter. In summer, the Brown-Headed Gull breeds in the high plateau of central Asia from Tajikistan to Inner Mongolia. In winter, its migrates south, crosses the Himalaya along the river valleys to winter in the lakes of the Subcontinent. According to one satellite tracking research it travels 2,400 km in two weeks.

Brown-headed Gulls are rare in Kathmandu Valley, with just two records of sightings in November 2004 and October 2005. The Brown-Headed and Black-Headed Gulls are similar in appearance, and are easy to confuse. The Brown-headed Gull is slightly bigger, but on closer observation the shape of its head, the colour of primaries eye are different.

The Brown-headed Gull has a steep forehead, whereas the black-headed gull has a smaller and rather rounded head. This feature is hard to view in flight, but easier to notice when they are floating. Brown-headed gull has striking long dark outer primaries or longer flight feathers. Ninth and tenth primaries are completely dark with spots near the tip, which is often indicative that it is young or their bird’s first winter. The gull seen in Taudaha was probably a Brown-headed Gull because of its dark eyes.