Acrocephalus bistrigiceps
Silhouette: Yves Hoebeke · PhyloPic
In 3 days <5%
The black-browed reed warbler (Acrocephalus bistrigiceps) is a marsh-warbler in the family Acrocephalidae. It was formerly included in the "Old World warbler" assemblage. The species was first described by Robert Swinhoe in 1860.
It breeds from eastern Mongolia and south-eastern Russia to eastern China and Japan, and winters in Southeast Asia. The black-browed reed warbler is similar and closely related to the more common and widespread Eurasian reed warbler. The bird spends its time foraging close to the ground inside undisturbed reed beds. Like many other wetland birds, it is of conservation concern owing to habitat loss due to the destruction of native marsh vegetation and its replacement by rice paddies and fishponds. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 2 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 3 | Khao Yai National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jinan | 🇨🇳 China | |
| 2 | Ho Chi Minh City | 🇻🇳 Vietnam | |
| 3 | Đà Nẵng | 🇻🇳 Vietnam | |
| 4 | Phnom Penh | 🇰🇭 Cambodia | |
| 5 | Beijing | 🇨🇳 China | |
| 6 | Qingdao | 🇨🇳 China | |
| 7 | Bangkok | 🇹🇭 Thailand | |
| 8 | Hangzhou | 🇨🇳 China | |
| 9 | Tuen Mun | 🇨🇳 China | |
| 10 | Singapore | 🇸🇬 Singapore |
Rare
Under 5% of wildlife watchers report a Black-browed Reed Warbler sighting in Kolkata on a given day, based on 44 verified sightings from GBIF citizen-science data. It is the 183rd most-seen of the 247 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Black-browed Reed Warbler in Kolkata on a given day, so our monthly data shows no clear season.
15th of 18
Of the 18 cities where we can rate Black-browed Reed Warbler sightings, Kolkata ranks 15th at under 5%. The best odds are in Jinan (China, about 10%), Ho Chi Minh City (Vietnam, about 10%) and Đà Nẵng (Vietnam, about 10%).
Same genus: Acrocephalus
The closest relatives of the Black-browed Reed Warbler that you can see in Kolkata (genus Acrocephalus, Reed Warblers) are Blyth's Reed Warbler (about 20%) and Clamorous Reed Warbler (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Black-browed Reed Warbler is recorded against all the birds logged in Kolkata (44 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.
