Chroicocephalus brunnicephalus
Silhouette: Michael Scroggie · PhyloPic
In 3 days ~10%
The brown-headed gull (Chroicocephalus brunnicephalus) is a small gull which breeds in the high plateaus of central Asia from Tajikistan to Ordos in Inner Mongolia. It is migratory, wintering on the coasts and large inland lakes of the Indian subcontinent. As is the case with many gulls, was traditionally placed in the genus Larus.
This gull breeds in colonies in large reedbeds or marshes, or on islands in lakes, nesting on the ground. Like most gulls, it is highly gregarious in winter, both when feeding or in evening roosts. It is not a pelagic species, and is rarely seen at sea far from coasts.
This is a bold and opportunist feeder, which will scavenge in towns or take invertebrates in ploughed fields with equal relish. The brown-headed gull is slightly larger than black-headed gull. The summer adult has a pale brown head, lighter than that of black-headed, a pale grey body, and red bill and legs. The black tips to the primary wing feathers have conspicuous white "mirrors". The underwing is grey with black flight feathers. The brown hood is lost in winter, leaving just dark vertical streaks.
This bird takes two years to reach maturity. First year birds have a black terminal tail band, more dark areas in the wings, and, in summer, a less homogeneous hood. This is a noisy species, especially at colonies. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sundarbans National Park | 🇮🇳 India | |
| 2 | Kaziranga National Park | 🇮🇳 India | |
| 3 | Ranthambore National Park | 🇮🇳 India | |
| 4 | Keoladeo National Park | 🇮🇳 India | |
| 5 | Satpura National Park | 🇮🇳 India |
Rare
Under 5% of wildlife watchers report a Brown-headed Gull sighting in Kalyan-Dombivli on a given day, based on 23 verified sightings from GBIF citizen-science data. It is the 131st most-seen of the 179 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
February
In that month about 10% of wildlife watchers report a Brown-headed Gull in Kalyan-Dombivli on a given day, against under 5% in March to January, the lowest months. That is one of Kalyan-Dombivli's driest months, with almost no rain against 830 mm in July.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Brown-headed Gull sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
19th of 26
Of the 26 cities where we can rate Brown-headed Gull sightings, Kalyan-Dombivli ranks 19th at under 5%. The best odds are in Mumbai (India, about 10%), Kochi (India, about 10%) and Rajkot (India, about 10%).
GBIF citizen-science records
It is estimated from how often the Brown-headed Gull is recorded against all the birds logged in Kalyan-Dombivli (23 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
