I developed this checklist after discussions in 2014 on the community forum. It remains a work in progress and I update it every 6-12 months. The checklist started life based on the IUCN’s Red List but is now much more closely aligned with the American Society of Mammalogists’ Mammal Diversity Database (MDD) because this database is more current than the IUCN Red List.

My list differs from the the MDD occasionally. I include a few ‘new’ species that I believe are in the pipeline even if they have not been formally described. I also ignore a few MDD lumps and splits that are still tentative and might be undone. The taxonomic order largely follows Wilson & Reeder’s Mammals of the World (2005, Johns Hopkins University Press).

It isn’t perfect, but it might be the least imperfect list there is from a mammalwatcher’s point of view. Please send comments to me, or post them on the forum.

The spreadsheet also lists changes made over time since I started it.

Download the latest global mammal checklist in Excel (as at January 2022). You can also record your mammal sightings with the excellent Scythebill listing sofrware. It uses this list as its taxonomy.

Here is some interesting discussion on differing taxonomies that influenced the presentation of this list. And here is more.