Bonasa fossil map
Where fossils of Bonasa 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 | 1.8 million years ago to the present (Calabrian to Holocene) |
| Periods | Quaternary |
| Family | Phasianidae |
| Named by | Stephens 1819 |
| Fossil records | 17 occurrences at 15 locations (PBDB) |
| Found in | United States, Spain, Canada |
| Rock formations | txn:39340, American Falls Lake Bed E |
About Bonasa
The ruffed grouse (Bonasa umbellus) is a medium-sized grouse occurring in forests from the Appalachian Mountains across Canada to Alaska. It is the most widely distributed game bird in North America. It is not migratory. It is the only species in the genus Bonasa. The ruffed grouse is sometimes incorrectly referred to as a "partridge", an unrelated phasianid, and occasionally confused with the grey partridge, a bird of open areas rather than woodlands.
The ruffed grouse is the state game bird of Pennsylvania, United States.
Text in “About” is quoted from the Wikipedia article Ruffed grouse (revision 1380703439), 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: Q19058.
.jpg){kind=link}