Tsidiiyazhi fossil map
Where fossils of Tsidiiyazhi have been found, shown on the Earth as it looked about 66 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 66 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 | 63.4–60.9 million years ago (Danian to Selandian) |
| Periods | Paleogene |
| Family | Sandcoleidae |
| Named by | Ksepka et al. 2017 |
| Fossil records | 1 occurrences at 1 locations (PBDB) |
| Found in | United States |
| Rock formations | Nacimiento |
About Tsidiiyazhi
Tsidiiyazhi abini (Navajo: little morning bird) is an extinct relative of the modern mousebirds, found in 2017 in the Nacimiento Formation on ancestral Navajo lands in New Mexico. It is the only species in the genus Tsidiiyazhi. It lived between 62.2 and 62.5 million years ago, making it one of the oldest Cenozoic birds yet described.
Text in “About” is quoted from the Wikipedia article Tsidiiyazhi (revision 1369351032), 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: Q74375431.
