Mareca falcata
Silhouette: Andy Wilson · PhyloPic
In 3 days ~30% in a week ~50%
The falcated duck or falcated teal (Mareca falcata) is a gadwall-sized dabbling duck from the east Palearctic (East Siberia and Mongolia to North Japan; wintering to India). The closest relative of this species is the gadwall, followed by the wigeons. The species was assigned to the proposed genus Mareca after its previous placement in the genus Anas was found to be paraphyletic in 2009.
There are many species that have mitochondrial DNA lineages that are phylogenetically intermixed with other species, but studies have rarely tested the cause of such paraphyly. In a study that was conducted, there were tested two hypotheses that could explain mitochondrial paraphyly of Holarctic gadwalls (Anas strepera) with respect to Asian falcated ducks (A. falcata). First, hybridization could have resulted in falcated duck mitochondrial DNA (mtDNA) introgressing into the gadwall gene pool. Second, gadwalls and falcated ducks could have diverged so recently that mtDNA lineages have not sorted to reciprocal monophyly. They used coalescent analyses of three independent loci to distinguish between these two hypotheses. Two lines of evidence support introgression. First, analyses of the... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kaziranga National Park | 🇮🇳 India | |
| 2 | Keoladeo National Park | 🇮🇳 India | |
| 3 | Chitwan National Park | 🇳🇵 Nepal |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Disney's Animal Kingdom | 🇺🇸 United States | |
| 2 | San Diego Zoo | 🇺🇸 United States | |
| 3 | Cleveland Metroparks Zoo | 🇺🇸 United States | |
| 4 | Minnesota Zoo | 🇺🇸 United States | |
| 5 | Whitcliff Park (Deer Park) | 🇬🇧 United Kingdom | |
| 6 | Bronx Zoo | 🇺🇸 United States | |
| 7 | Moody Gardens | 🇺🇸 United States | |
| 8 | Tanganyika Wildlife Park | 🇺🇸 United States | |
| 9 | Fort Worth Zoo | 🇺🇸 United States | |
| 10 | Gatorland | 🇺🇸 United States | |
| 11 | Rosamond Gifford Zoo | 🇺🇸 United States | |
| 12 | Cleres Zoological Park | 🇫🇷 France | |
| 13 | Inokashira Park Zoo | 🇯🇵 Japan | |
| 14 | Elmwood Park Zoo | 🇺🇸 United States | |
| 15 | Tracy Aviary | 🇺🇸 United States | |
| 16 | Battersea Park Children's Zoo | 🇬🇧 United Kingdom | |
| 17 | Animal Enclosure | 🇬🇧 United Kingdom | |
| 18 | Wild Discovery Zoo | 🇬🇧 United Kingdom | |
| 19 | Greater Cleveland Aquarium | 🇺🇸 United States | |
| 20 | Kung Fu Corals | 🇺🇸 United States | |
| 21 | Llys Nini | 🇬🇧 United Kingdom | |
| 22 | ResQue Ranch Inc. | 🇺🇸 United States | |
| 23 | Sea Life London Aquarium | 🇬🇧 United Kingdom | |
| 24 | Zoological Wildlife Foundation | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Falcated Duck sighting in Daejeon on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 50th most-seen of the 69 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
February and March
In those months about 20% of wildlife watchers report a Falcated Duck in Daejeon on a given day, against under 5% in April, July–August, October and December, the lowest months. Those are among Daejeon's driest months, with about 40 mm of rain a month against 320 mm in July.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Falcated Duck sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 20 cities where we can rate Falcated Duck sightings, Daejeon ranks 5th at about 10%, level with the leaders once rounded. The best odds are in Jinan (China, about 10%), Dalian (China, about 10%) and Hangzhou (China, about 10%).
GBIF citizen-science records
It is estimated from how often the Falcated Duck is recorded against all the birds logged in Daejeon (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.
