Gyps tenuirostris
Silhouette: Shyamal · PhyloPic
In 3 days ~70% in a week ~90%
The slender-billed vulture (Gyps tenuirostris) is an Old World vulture species native to sub-Himalayan regions and Southeast Asia. It is Critically Endangered since 2002 as the population on the Indian subcontinent has declined rapidly. As of 2021, fewer than 870 mature individuals are thought to remain.
It used to be the Indian vulture, under the name of "long-billed vulture". However, these two species have non-overlapping distribution ranges and can be immediately told apart by trained observers, even at considerable distances. The Indian vulture is found only to the south of the Ganges and breeds on cliffs while the slender-billed vulture is found along and nests in trees.
At 80 to 95 cm (31 to 37 in), in length, this mid-sized vulture is about the same size as its sister species, the Indian vulture. The wingspan of the vulture ranges from 196 to 258 cm (77 to 102 in). The slender-billed vulture is commonly mistaken for the Indian vulture, but there are a few key differences that differentiate the two species, primarily its darker head, and bill that is thinner than its sister species. This vulture is mostly grey with a pale rump and grey under-tail coverts. The... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kaziranga National Park | 🇮🇳 India | |
| 2 | Chitwan National Park | 🇳🇵 Nepal |
Possible
About 30% of wildlife watchers report a Slender-billed Vulture sighting in Kaziranga National Park on a given day, based on 600 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 76th most-seen of the 323 birds we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
March and April
In those months about 40% of wildlife watchers report a Slender-billed Vulture in Kaziranga National Park on a given day, against about 10% in October, the lowest month. June and July have too few records to rate.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Slender-billed Vulture sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Slender-billed Vulture sightings, Kaziranga National Park has the highest daily chance: about 30%. Next come Chitwan National Park (Nepal, about 10%).
GBIF citizen-science records
It is estimated from how often the Slender-billed Vulture is recorded against all the birds logged in Kaziranga National Park (600 verified sightings from 2019 to 2026), 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.
