- These lists include all stamps featuring prehistoric / extinct bears
- I do not own Stanley Gibbons and Michel catalogs, so I cannot verify those numbers are valid. Please make sure to check all numbers before using this list as a reference to buy stamps.
- Stamps may appear on more than one list.
| Catalog | Full Prehistoric Bears List | New/Modified Only List |
| Scott | November 27, 2011 | November 27, 2011 |
| Scott | n/a | All added/modified in 2011 |
| Stanley Gibbons | December 25, 2011 | December 25, 2011 |
| Stanley Gibbons | n/a | All added/modified in 2011 |
| Michel | April 30, 2011 | n/a |
| (all) | n/a | All added/modified in 2011 |
| (all) | n/a | All added/modified in 2010 - none |
| (various) | September 3, 2010 prehistoric stationery | n/a |