Anas undulata
Silhouette: Sheatherius · PhyloPic
In 3 days <5%
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 |
Rare
Under 5% of wildlife watchers report a Yellow-billed Duck sighting in Masai Mara National Reserve on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 355th most-seen of the 398 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 Yellow-billed Duck in Masai Mara National Reserve on a given day, so our monthly data shows no clear season.
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.
23rd of 25
Of the 25 parks where we can rate Yellow-billed Duck sightings, Masai Mara National Reserve ranks 23rd at under 5%. 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 Masai Mara National Reserve (13 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.
