Waltonavis fossil map
Where fossils of Waltonavis have been found, shown on the Earth as it looked about 56 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 56 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 | 56–48.07 million years ago (Ypresian) |
| Periods | Paleogene |
| Named by | Mayr and Kitchener 2023 |
| Fossil records | 2 occurrences at 1 locations (PBDB) |
| Found in | United Kingdom |
| Rock formations | London Clay |
About Waltonavis
Waltonavis (meaning "Walton bird") is an extinct genus of potentially leptosomiform bird from the Early Eocene London Clay Formation of Essex, United Kingdom. The genus contains two species: W. paraleptosomus and W. danielsi, both known from partial skeletons.
Text in “About” is quoted from the Wikipedia article Waltonavis (revision 1380013022), 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: Q115941063.