Anas zonorhyncha
Silhouette: Sheatherius · PhyloPic
In 3 days ~40% in a week ~70%
The eastern spot-billed duck or Chinese spot-billed duck (Anas zonorhyncha) is a species of dabbling duck that breeds in East and Southeast Asia. This species was formerly considered a subspecies of the Indian spot-billed duck and both were referred to as the spot-billed duck (A. poecilorhyncha). The name is derived from the yellow spot on the bill.
The eastern spot-billed duck was described by the English biologist Robert Swinhoe in 1866 under its current binomial name Anas zonorhyncha. The name of the genus Anas is the Latin word for a duck. The specific epithet zonorhyncha is derived from the classical Greek words zōnē meaning "band" or "girdle" and rhunkhos meaning "bill".
Historically, the eastern spot-billed duck was usually considered as a subspecies of the Indian spot-billed duck (A. poecilorhyncha). The American ornithologist Bradley Livezey in a morphological study of the dabbling ducks published in 1991 proposed that the eastern spot-billed duck should be promoted to species status. Subsequently, fieldwork conducted at Hong Kong in southern China found that although both the eastern spot-billed duck and the Indian spot-billed duck (subspecies A. poecilorhyncha... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan | |
| 2 | Kaziranga National Park | 🇮🇳 India |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | SeaWorld San Antonio | 🇺🇸 United States | |
| 2 | Chimelong Safari Park | 🇨🇳 China | |
| 3 | 无锡动物园 | 🇨🇳 China | |
| 4 | Nikolaev Zoo | 🇺🇦 Ukraine | |
| 5 | Vogelpark Marlow | 🇩🇪 Germany | |
| 6 | 杭州动物园 | 🇨🇳 China | |
| 7 | Asahiyama Zoo | 🇯🇵 Japan | |
| 8 | Green World Ecological Farm | 🇹🇼 Taiwan | |
| 9 | Ueno Zoological Gardens (West Garden) | 🇯🇵 Japan | |
| 10 | Shinagawa Aquarium | 🇯🇵 Japan | |
| 11 | Cologne Zoo Aquarium | 🇩🇪 Germany | |
| 12 | Hangzhou Zoo | 🇨🇳 China | |
| 13 | Yokohama Omoshiro Aquarium | 🇯🇵 Japan |
Possible
About 20% of wildlife watchers report an Eastern Spot-billed Duck sighting in Jinhua on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 39th most-seen of the 74 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
December
In that month about 40% of wildlife watchers report an Eastern Spot-billed Duck in Jinhua on a given day, against about 10% in April–May and August–October, the lowest months. That is one of Jinhua's driest months, with about 65 mm of rain against 300 mm in June. January–March and July have too few records to rate.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Eastern Spot-billed Duck sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
28th of 47
Of the 47 cities where we can rate Eastern Spot-billed Duck sightings, Jinhua ranks 28th at about 20%. The best odds are in Sendai (Japan, about 80%), Daejeon (South Korea, about 80%) and Tokyo (Japan, about 70%).
GBIF citizen-science records
It is estimated from how often the Eastern Spot-billed Duck is recorded against all the birds logged in Jinhua (10 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.
