Turdus boulboul
Silhouette: PhyloPic
In 3 days ~10% in a week ~20%
The grey-winged blackbird (Turdus boulboul) is a species of Turdus in the thrush family, found at in the mountains of southern and eastern Asia from the Himalayas to northern Vietnam. Its natural habitat is in the middle altitudes of subtropical or tropical moist montane forests, mostly at 1800–2700 m altitude, but occasionally down to 1200 m in winter, and as high as 3300 m in summer.
It is a large thrush, 28–29 cm long and 88–111 g weight, with distinct sexual dimorphism in plumage. The males are black with faint pale fringes on the belly, and a broad grey patch on the wing covert, secondary, and tertial feathers, somewhat reminiscent of a ring ouzel but more uniformly grey. The females are a plain brown, with only a hint of paler brown on the wings where the males have their grey patch. The bill is bright yellow in males, dull yellow to brownish in females. Both sexes also have a narrow eye ring, yellow in males and greyish in females. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 2 | Langtang National Park | 🇳🇵 Nepal | |
| 3 | Jim Corbett National Park | 🇮🇳 India | |
| 4 | Manas National Park | 🇮🇳 India |
Rare
Under 5% of wildlife watchers report a Gray-winged Blackbird sighting in Dehradun on a given day, based on 164 verified sightings from GBIF citizen-science data. It is the 124th most-seen of the 280 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
February
In that month about 10% of wildlife watchers report a Gray-winged Blackbird in Dehradun on a given day, against under 5% in March to January, the lowest months. That is one of Dehradun's driest months, with about 45 mm of rain against 370 mm in July.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Gray-winged Blackbird sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 cities where we can rate Gray-winged Blackbird sightings, Dehradun has the highest daily chance: under 5%. Next come Srinagar (India, under 5%) and Kathmandu (Nepal, under 5%).
GBIF citizen-science records
It is estimated from how often the Gray-winged Blackbird is recorded against all the birds logged in Dehradun (164 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.
