Aix fossil map
Where fossils of Aix have been found, shown on the Earth as it looked about 0 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 0 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →

| Group | Prehistoric birds |
|---|---|
| Lived | 13.82 million years ago to the present (Serravallian to Holocene) |
| Periods | Neogene, Quaternary |
| Family | Anatidae |
| Named by | Boie 1828 |
| Fossil records | 15 occurrences at 15 locations (PBDB) |
| Found in | United States, Mongolia, Japan, United Kingdom, Canada |
| Rock formations | txn:39624, Caloosahatchee, Oshin, Okeechobee |
About Aix
Aix is a bird genus that contains two species of ducks: the wood duck (Aix sponsa), and the mandarin duck (Aix galericulata). Aix (αἴξ, genitive αἰγός) is an Ancient Greek word used by Aristotle to refer to an unknown diving bird.
Text in “About” is quoted from the Wikipedia article Aix (bird) (revision 1368780575), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q131450.