Circus melanoleucos
Silhouette: Shyamal · PhyloPic
In 3 days ~10% in a week ~30%
The pied harrier (Circus melanoleucos) is a bird of prey in the family Accipitridae, named for the male's distinctive white and black colouration. It is a migratory bird endemic to Asia, ranging roughly from southern Siberia to the Philippines. They are primarily solitary although will sometimes form loose groups. They mostly live in open country and eat small mammals.
The pied harrier is a medium-sized raptor. They measure 41-49cm (16 – 19 in) from the end of the tail to tip of the beak. Adult males weigh 265–325g, while adult females weigh 390–455g. They perch on reeds, posts, or on the ground, rarely on trees. Their wings reach far down their tail but not past the tip.
The male is black on the head, neck, back, breast, and primary flight feathers, and white on the forewing, rump, and the rest of its underparts. It has striking yellow eyes. The female is similar looking to that of Montagu's harrier. It is generally dark brown above and pale brown to white below with dark streaking, and a small white rump. Unlike the male, it generally has brown eyes.
The juvenile pied harrier resembles a juvenile Montagu's harrier. It Is darker above than an adult female, with rich... Wikipedia →
Flight call0:16
Russian Federation · 2017
© Alex Thomas · XC379706 · CC BY-NC-SA 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manas National Park | 🇮🇳 India | |
| 2 | Kaziranga National Park | 🇮🇳 India | |
| 3 | Royal Manas National Park | 🇧🇹 Bhutan |
Rare
Under 5% of wildlife watchers report a Pied Harrier sighting in Kolkata on a given day, based on 390 verified sightings from GBIF citizen-science data. It is the 102nd most-seen of the 247 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
December to February
In those months about 10% of wildlife watchers report a Pied Harrier in Kolkata on a given day, against under 5% in March to November, the lowest months. Those are among Kolkata's driest months, with about 15 mm of rain a month against 330 mm in July.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Pied Harrier 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 7 cities where we can rate Pied Harrier sightings, Kolkata has the highest daily chance: under 5%. Next come Beijing (China, under 5%) and Bangkok (Thailand, under 5%).
GBIF citizen-science records
It is estimated from how often the Pied Harrier is recorded against all the birds logged in Kolkata (390 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.
