Anas undulata
Silhouette: Sheatherius · PhyloPic
In 3 days ~50% in a week ~80%
The yellow-billed duck (Anas undulata) is a 51–58 cm long dabbling duck which is an abundant resident breeder in southern and eastern Africa. This duck is not migratory, but wanders in the dry season to find suitable waters. It is highly gregarious outside the breeding season and forms large flocks.
These are mallard-sized mainly grey ducks with a darker head and bright yellow bill. The wings are whitish below, and from above show a white-bordered green speculum. Sexes are similar, and juveniles are slightly duller than adults. The north-eastern race is darker and has a brighter bill and blue speculum.
It is a bird of freshwater habitats in fairly open country and feeds by dabbling for plant food mainly in the evening or at night. It nests on the ground in dense vegetation near water. Rarely, it is found in suburban areas, in close proximity to golf courses, parks and lakes or dams. The clutch numbers between six and twelve eggs.
The male has a teal-like whistle, whereas the female has a mallard-like quack. There are two subspecies of the yellow-billed duck: A. undulata rueppelli (northern yellow-billed duck) and A. undulata undulata (southern yellow-billed duck... Wikipedia →
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Disney's Animal Kingdom | 🇺🇸 United States | |
| 2 | SeaWorld Orlando | 🇺🇸 United States | |
| 3 | Dresden Zoo | 🇩🇪 Germany | |
| 4 | Paris Zoological Park | 🇫🇷 France | |
| 5 | Zoo Pilsen | 🇨🇿 Czechia | |
| 6 | Aquarium du palais de la Porte Dorée | 🇫🇷 France | |
| 7 | Omaha’s Henry Doorly Zoo and Aquarium | 🇺🇸 United States | |
| 8 | Jacksonville Zoo and Gardens | 🇺🇸 United States | |
| 9 | Centro Cicogne e Anatidi | 🇮🇹 Italy | |
| 10 | Alipore Zoological Gardens | 🇮🇳 India | |
| 11 | Cologne Zoological Garden | 🇩🇪 Germany | |
| 12 | Hanover Zoo | 🇩🇪 Germany | |
| 13 | Rosamond Gifford Zoo | 🇺🇸 United States | |
| 14 | Valencia Bioparc | 🇪🇸 Spain | |
| 15 | Monkeyland | 🇿🇦 South Africa | |
| 16 | Santillana Zoo | 🇪🇸 Spain | |
| 17 | World of Birds Wildlife Sanctuary and Monkey Park | 🇿🇦 South Africa | |
| 18 | Bioparc Fuengirola | 🇪🇸 Spain | |
| 19 | Birds of Eden | 🇿🇦 South Africa | |
| 20 | Cologne Zoo Aquarium | 🇩🇪 Germany | |
| 21 | Snakeroom Serpentarium | 🇪🇸 Spain |
Possible
About 20% of wildlife watchers report a Yellow-billed Duck sighting in iSimangaliso Wetland Park on a given day, based on 400 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 78th most-seen of the 351 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
June
In that month about 40% of wildlife watchers report a Yellow-billed Duck in iSimangaliso Wetland Park on a given day, against about 10% in October and December–February, the lowest months. That is one of iSimangaliso Wetland Park's driest months, with about 35 mm of rain against 130 mm in February.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Yellow-billed Duck sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
10th of 25
Of the 25 parks where we can rate Yellow-billed Duck sightings, iSimangaliso Wetland Park ranks 10th at about 20%. The best odds are in Bale Mountains National Park (Ethiopia, about 80%), Aberdare National Park (Kenya, about 40%) and Lake Nakuru National Park (Kenya, about 30%). All parks ranked.
GBIF citizen-science records
It is estimated from how often the Yellow-billed Duck is recorded against all the birds logged in iSimangaliso Wetland Park (400 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.
